| Patent Number |
Title Of Patent |
Date Issued |
| 6570462 |
Adaptive tuning device and method utilizing a surface acoustic wave device for tuning a wireless |
May 27, 2003 |
| An adaptive tuning method for a wireless communication device determines the impedance of a matching circuit relative to an impedance to be matched and adjusts the impedance of the matching circuit accordingly. A passive surface acoustic wave (SAW) device includes multiple terminated |
| 6535949 |
Portable electronic device having a log-structured file system in flash memory |
March 18, 2003 |
| A portable electronic device includes a log-structured file system implemented in flash memory, The log-structured file system includes a write function for storing contiguous data records to the flash memory in the form of at least one data log, although the system may write data re |
| 6489950 |
Hand-held electronic device with auxiliary input device |
December 3, 2002 |
| A hand-held electronic device with a keyboard, thumbwheel, display and associated software is optimized for use of the device with the thumbs. The associated software has a plurality of features to optimize efficient use of the limited keyboard space and encourage the use of the device b |
| 6483388 |
Direct digital frequency synthesizer and a hybrid frequency synthesizer combining a direct digit |
November 19, 2002 |
| A direct digital frequency synthesizer and a hybrid frequency synthesizer combining the direct digital frequency synthesizer and a phase locked loop is provided. The direct digital frequency synthesizer includes a phase accumulator that is configured to generate a discrete phase signal. |
| 6477529 |
Apparatus and method for dynamically limiting information sent to a viewing device |
November 5, 2002 |
| A system and method for transporting user-restricted data from a gateway device to a handheld viewing device is provided. The gateway device includes an information translator, content filters, and storage. The information translator delivers content from an information database coup |
| 6473733 |
Signal enhancement for voice coding |
October 29, 2002 |
| An adaptive noise suppression system includes an input A/D converter, an analyzer, a filter, and a output D/A converter. The analyzer includes both feed-forward and feedback signal paths that allow it to compute a filtering coefficient, which is input to the filter. In these paths, f |
| 6463464 |
System and method for pushing information from a host system to a mobile data communication devi |
October 8, 2002 |
| A system and method for pushing information from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect certain user-selected data items from the host |
| 6463463 |
System and method for pushing calendar event messages from a host system to a mobile data commun |
October 8, 2002 |
| A system and method for pushing information, such as calendar event messages, from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect calendar event |
| 6463112 |
Phase locked-loop using sub-sampling |
October 8, 2002 |
| A PLL-based frequency synthesizer is provided that includes a phase detector, a loop filter, a VCO, a sampler and filter system, and a frequency divider. This architecture reduces the high division ratio (N) necessary in a classical PLL-based frequency synthesizer while maintaining l |
| 6462698 |
Wireless communication system using surface acoustic wave (SAW) single-phase unidirectional tran |
October 8, 2002 |
| SAW devices such as interdigital transducers (IDTs) have been widely used in RADAR applications and as filters. An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the |
| 6452588 |
Hand-held e-mail device |
September 17, 2002 |
| A hand-held electronic device with a keyboard optimized for use with the thumbs is disclosed. In order to operate within the limited space available on a hand-held electronic device, the present invention optimizes the placement and shape of the keys, preferably using keys that are o |
| 6438585 |
System and method for redirecting message attachments between a host system and a mobile data co |
August 20, 2002 |
| A system and method for pushing information from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect certain user-selected data items from the host |
| 6426614 |
Boot-strapped current switch |
July 30, 2002 |
| A boot-strapped current switch is provided that includes a biasing network, a control signal, a transistor, a control switch and a boot-strapping circuit. The biasing network generates a substantially constant voltage on a biasing network output. The transistor has a control terminal, a |
| 6405910 |
Removable retaining clip assembly |
June 18, 2002 |
| An apparatus is provided for use with a handheld device. The apparatus includes a panel configured to provide support for the handheld device, defining an aperture and having a mating structure located in the aperture. The apparatus further includes a clip assembly operative to engag |
| 6401113 |
System and method for pushing information from a host system to a mobile data communication devi |
June 4, 2002 |
| A system and method for pushing information from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect certain user-selected data items from the host |
| 6396482 |
Hand-held electronic device with a keyboard optimized for use with the thumbs |
May 28, 2002 |
| A hand-held electronic device with a keyboard, thumbwheel, display and associated software is optimized for use of the device with the thumbs. The associated software has a plurality of features to optimize efficient use of the limited keyboard space and encourage the use of the device b |
| 6389457 |
System and method for pushing information from a host system to a mobile data communication devi |
May 14, 2002 |
| A system and method for pushing information from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect certain user-selected data items from the host |
| 6380711 |
Battery recharging device and method and an automatic battery detection system and method theref |
April 30, 2002 |
| A system includes a recharging device to which an electronic hand-held device powered by a battery can be connected. A controller associated with the recharging device performs a method of intemal-device battery cell detection, i.e., distinguishing between NiMH/NiCd and other types of ce |
| 6329951 |
Electrically connected multi-feed antenna system |
December 11, 2001 |
| An antenna system for a portable transceiver device comprises an antenna structure for transmitting and receiving RF signals. The antenna structure includes multiple feeding ports having a common structure fully coupling multiple antennas together. This antenna structure is made of a con |
| 6278442 |
Hand-held electronic device with a keyboard optimized for use with the thumbs |
August 21, 2001 |
| A hand-held electronic device with a keyboard optimized for use with the thumbs is disclosed. In order to operate within the limited space available on a hand-held electronic device, the present invention optimizes the placement and shape of the keys, preferably using keys that are o |
| 6271605 |
Battery disconnect system |
August 7, 2001 |
| A battery disconnect system is provided for a device having a battery and load. The battery disconnect system includes a switch that is operative to connect the battery to the load when the switch is in a closed state. The switch is also operative to disconnect the battery from the load |
| 6262609 |
Closed-loop voltage-to-frequency converter |
July 17, 2001 |
| A closed-loop voltage-to-frequency (V/F) converter includes a voltage-controlled-oscillator (VCO) placed in a feedback voltage-locked loop (VLL). This converter achieves both wide bandwidth (for good phase-noise suppression) and good spurious rejection. The closed-loop V/F converter |
| 6255915 |
Differential surface acoustic wave filter having balanced outputs |
July 3, 2001 |
| A differential SAW filter having a cascaded structure includes including an input SAW stage and an output SAW stage. The two SAW stages are configured so that the distance of travel of the surface acoustic waves from a single unbalanced input of the input stage to the dual balanced outpu |
| 6219694 |
System and method for pushing information from a host system to a mobile data communication devi |
April 17, 2001 |
| A system and method for pushing information from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect certain user-selected data items from the host |
| 6191551 |
Automatic battery detection system and method for detecting a rechargeable battery with low rema |
February 20, 2001 |
| A system includes a charging cradle that receives a electronic hand-held device powered by a battery. Inside the charging cradle a controller performs a method of internal-device battery cell detection, i.e., distinguishing between NiMH/NiCd and other types of cells in the battery, b |
| 6180876 |
Apparatus and method for RF shielding of a printed circuit board |
January 30, 2001 |
| An apparatus and method for shielding discrete areas of a printed circuit board from electromagnetic interference includes a frame and separate shielding lids. The frame is surface mount soldered onto the solder tracks of a printed circuit board and provides fences which divide the print |
| 6160383 |
Indirect contact battery temperature detection for rechargeable battery system |
December 12, 2000 |
| A battery recharging system and method are provided that include a rechargeable battery coupled to a recharging circuit. A recharging operation performed by the recharging circuit is controlled by a temperature measuring system, which is both electrically and thermally coupled to a c |
| 6104759 |
Power supply system for a packet-switched radio transmitter |
August 15, 2000 |
| An improved power supply system involves load-leveling the large transient currents drawn by a high power, low duty-cycle load application circuit by means of a high performance capacitive charge storage device, such as a super-capacitor or a network of super-capacitors. The improved pow |
| 6075470 |
Block-wise adaptive statistical data compressor |
June 13, 2000 |
| A block-wise adaptive statistical data compressor is disclosed that operates by replacing characters in a data block with super-character codewords comprising a variable length prefix and a fixed length index. The codewords are determined by treating a plurality of groups of characte |
| 6073318 |
Retaining clip assembly |
June 13, 2000 |
| A clip is disclosed for securing a device to a support structure. The clip assembly includes a clip for pivoting about a pivoting axis, wherein the clip includes a securing end for engaging the support structure. A base is attached to the device, for receiving the clip. A biasing member |
| 6061557 |
Translation and connection device for radio frequency point of sale transaction systems |
May 9, 2000 |
| A device is provided that interfaces with existing point of sale credit card reading devices, and furnishes the option of transmitting data over either the existing modem installation or a radio frequency data communication network. The device scans the information encoded on the cre |
| 6034623 |
Autonomous radio telemetry |
March 7, 2000 |
| An improved radio modem is disclosed for use with an autonomous radio telemetry system. The radio modem includes a reprogrammable microprocessor, a radio transceiver, and a serial interface. By providing a software program within the radio modem that converts the serial interface int |
| 6031505 |
Dual embedded antenna for an RF data communications device |
February 29, 2000 |
| An RF antenna system is disclosed having at least one meandering antenna line with an aggregate structure formed to substantially extend in two dimensions, to effectively form a top-loaded monopole antenna. The meandering antenna line includes at least one localized bend for providing |
| 6018770 |
System and method for managing packet-switched connections |
January 25, 2000 |
| A system and method for managing connections between one or more local terminals and one or more remote systems over a packet-switched network is disclosed. The invention includes a gateway computer that forms a bridge between the local terminals and the one or more host systems, the gat |
| 5970090 |
Computer system for use with a wireless data communication network |
October 19, 1999 |
| The present invention provides a method for enhancing service signals transmitted by a DCE, such as a Modem, to a DTE user. Since any transmission from a remote computer to a DTE user through a wireless communication network can be encoded with additional information, use of an AT co |
| 5966098 |
Antenna system for an RF data communications device |
October 12, 1999 |
| An RF data communications device antenna system is shown that includes a dipole and an electromagnetic coupler that provides coupling between each dipole arm to establish a desired resonant bandwidth. An LC matching circuit is provided for matching the dipole to the impedance of the RF |
| 5917854 |
Wireless radio modem with minimal interdevice RF interference |
June 29, 1999 |
| A wireless radio modem for incorporation into a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimize the RF interference between the radio modem and the host system. Radio modem pow |
| 5821907 |
Antenna for a radio telecommunications device |
October 13, 1998 |
| A radio telecommunications antenna includes a telescoping antenna portion for substantially receiving an electromagnetic signal. The telescoping portion is attached by an antenna mast for conducting the electromagnetic signal. A dielectric spacer and an inductor are in electrical contact |
| 5802312 |
System for transmitting data files between computers in a wireless environment utilizing a file |
September 1, 1998 |
| A method and system in a data communication environment enables the exchange of information between a plurality of software applications through a selected communication device, such as a radio frequency modem. Messages received by modem are stored as files intended for one of a plur |
| 5764693 |
Wireless radio modem with minimal inter-device RF interference |
June 9, 1998 |
| A wireless radio modem that may be incorporated into a host system or connected through a PCMCIA or similar port to a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimizes the RF in |
| 5732346 |
Translation and connection device for radio frequency point of sale transaction systems |
March 24, 1998 |
| A device is provided that interfaces with existing point of sale credit card reading devices, and furnishes the option of transmitting data over either the existing modem installation or a radio frequency data communication network. The device scans the information encoded on the cre |
| 5727020 |
Wireless radio modem with minimal interdevice RF interference |
March 10, 1998 |
| A wireless radio modem for incorporation into a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimize the RF interference between the radio modem and the host system. Radio modem pow |
| 5715387 |
Method and system for loading and confirming correct operation of an application program in a ta |
February 3, 1998 |
| A method and system provides a special purpose or embedded system developer with the ability to confirm the correct operation of a computer program designed to operate on a target system whose processing and storage capabilities may be more austere than the host system upon which the |
| 5657345 |
Computer system for use with a wireless data communication network |
August 12, 1997 |
| The present invention provides a method for enhancing service signals transmitted by a DCE, such as a Modem, to a DTE user. Since any transmission from a remote computer to a DTE user through a wireless communication network can be encoded with additional information, use of an AT co |
| 5619531 |
Wireless radio modem with minimal interdevice RF interference |
April 8, 1997 |
| A wireless radio modem for incorporation into a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimize the RF interference between the radio modem and the host system. Radio modem pow |
| 5600790 |
Method and system for loading and confirming correct operation of an application program in a ta |
February 4, 1997 |
| A method and system provides a special purpose or embedded system developer with the ability to confirm the correct operation of a computer program designed to operate on a target system whose processing and storage capabilities may be more austere than the host system upon which the |
| 5559800 |
Remote control of gateway functions in a wireless data communication network |
September 24, 1996 |
| The present invention provides a method for user control of a gateway in a wireless data communicator network. The present invention includes transmitting a data packet to the gateway, including control data continuing a plurality of commands to be executed by the gateway. The gatewa |
| 5555241 |
Method and apparatus for maximizing the data transmission in a wireless data communication netwo |
September 10, 1996 |
| The present invention provides a method for padding to maximize the number of characters transmitted by data communication equipment (DCE), such as a modem, to data terminal equipment (DTE). By employing the disclosed padding method the data throughput will be maximized and costs will be |
| 5444763 |
Translation and connection device for radio frequency point of sale transaction systems |
August 22, 1995 |
| A device is provided that interfaces with existing point of sale credit card reading devices, and furnishes the option of transmitting data over either the existing modem installation or a radio frequency data communication network. The device scans the information encoded on the cre |
