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Class Information
Number: 250/221
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Controlled by article, person, or animal
Description: Subject matter in which the optical path between the light source and the photocell is directly affected by an object which is movable with respect to, is not part of and is not continuously associated with the photocell device.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619206 |
Tactile switch for a domestic appliance having a controller causing a radiation emitter and an auxiliary radiation emitter to emit radiation for a duration of time |
Nov. 17, 2009 |
| 7616895 |
Safety edge with status and failure recognition |
Nov. 10, 2009 |
| 7615734 |
Image capture device |
Nov. 10, 2009 |
| 7615733 |
Optical navigation apparatus and method for making the apparatus |
Nov. 10, 2009 |
| 7612325 |
Electrical sensor for monitoring degradation of products from environmental stressors |
Nov. 3, 2009 |
| 7612324 |
Distributed display composed of active fiducials |
Nov. 3, 2009 |
| 7605360 |
Power supply system for green laser indicating pen |
Oct. 20, 2009 |
| 7602286 |
Tamper detector for a security sensor |
Oct. 13, 2009 |
| 7601945 |
Position detecting device for detecting the absolute value of a position of a movable member which has a sensor mounted thereon |
Oct. 13, 2009 |
| 7598484 |
Photoelectric sensor for securing the safety of a work area |
Oct. 6, 2009 |
| 7595479 |
Tilt detector and tilt detecting method for the same |
Sep. 29, 2009 |
| 7595478 |
Method and device for processing optical signals in computer mouse |
Sep. 29, 2009 |
| 7590345 |
Optoelectronic protection device |
Sep. 15, 2009 |
| 7589311 |
Optoelectronic sensor and method for detecting objects with polarized light |
Sep. 15, 2009 |
| 7580361 |
Network system, information processor and electronic apparatus |
Aug. 25, 2009 |
| 7576312 |
Positioning apparatus for a printer |
Aug. 18, 2009 |
| 7576311 |
Optical detector having a sensing element, a lens and a frustum coupled to the lens |
Aug. 18, 2009 |
| 7573021 |
Method and apparatus for multiple scan rate swept wavelength laser-based optical sensor interrogation system with optical path length measurement capability |
Aug. 11, 2009 |
| 7570793 |
Correction method for data of a plurality of optoelectronic sensors |
Aug. 4, 2009 |
| 7569843 |
Method for processing receiver signal and optical sensor |
Aug. 4, 2009 |
| 7569806 |
Moving object detection photointerrupter having a determination of passing of the moving object based on its passing direction and the detection information of the next moving object and elect |
Aug. 4, 2009 |
| 7566862 |
Device, method, and program for responding based on change in wavelength of light |
Jul. 28, 2009 |
| 7566861 |
Detection device controlled by driving speed and driving direction |
Jul. 28, 2009 |
| 7564015 |
System and method for processing and displaying light energy |
Jul. 21, 2009 |
| 7557935 |
Optical coordinate input device comprising few elements |
Jul. 7, 2009 |
| 7557338 |
Electronic device with integrated optical navigation module and microlens array therefore |
Jul. 7, 2009 |
| 7557332 |
Driver circuit for driving a light source of an optical pointing device |
Jul. 7, 2009 |
| 7554076 |
Sensor system with modular optical transceivers |
Jun. 30, 2009 |
| 7551428 |
Automatic power control |
Jun. 23, 2009 |
| 7550708 |
Photoelectric sensor and emitting device for photoelectric sensor |
Jun. 23, 2009 |
| 7550707 |
Biometrics authentication system with authentication based upon multiple layers |
Jun. 23, 2009 |
| 7548316 |
System and method for lead edge and trail edge sheet constraint and curl sensing |
Jun. 16, 2009 |
| 7547866 |
Laser irradiation method and method for manufacturing semiconductor device including an autofocusing mechanism using the same |
Jun. 16, 2009 |
| 7544924 |
Directional input device with a light directing shaft |
Jun. 9, 2009 |
| 7541566 |
Transmitter, receiver, and system with relative position detecting functionality between transmitters and receivers |
Jun. 2, 2009 |
| 7538311 |
Image sensor and digital camera |
May. 26, 2009 |
| 7538310 |
Laser beam irradiation device with error position detection |
May. 26, 2009 |
| 7534992 |
Contactless connector for data transmission including rotating and fixed light elements |
May. 19, 2009 |
| 7534989 |
Detecting device and laminated body manufacturing apparatus employing such detecting device |
May. 19, 2009 |
| 7534988 |
Method and system for optical tracking of a pointing object |
May. 19, 2009 |
| 7531788 |
Photosensor comprising light receiving elements and filters, and a corresponding target detection method and display panel |
May. 12, 2009 |
| 7531787 |
Access control device |
May. 12, 2009 |
| 7528355 |
System and method for processing and displaying light energy |
May. 5, 2009 |
| 7525084 |
Input device, electronic apparatus and method for controlling input device |
Apr. 28, 2009 |
| 7525082 |
System and method for performing optical navigation on glass-like navigation surfaces |
Apr. 28, 2009 |
| 7523885 |
Hands-free electronic towel dispenser with power saving feature |
Apr. 28, 2009 |
| 7521668 |
Optical audio microphone arrangement including a Michelson type interferometer for providing a phase difference between different parts of light beams |
Apr. 21, 2009 |
| 7521665 |
Sensor system, sensor element, and method with a light sensor and an electrical sensor for monitoring a closing mechanism |
Apr. 21, 2009 |
| 7521664 |
Laser direction detection |
Apr. 21, 2009 |
| 7521662 |
Portable handheld artificial light detector |
Apr. 21, 2009 |
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