| Patent Number |
Title Of Patent |
Date Issued |
| 7127170 |
Optical frequency division multiplexing network |
October 24, 2006 |
| An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to |
| 6632023 |
Optical module connector adaptor |
October 14, 2003 |
| An adapter 5 for an optical connector comprises a pair of wall portions 55a and 55b on a mounting surface 56a. The structure allows the adapter to accommodate an optical connector 4 inserted from a direction vertical to the mounting surface 56a, and allows the adapter to accommodate an o |
| 6619865 |
Optical frequency division multiplexing network |
September 16, 2003 |
| An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be |
| 6497516 |
Guide pin for optical fiber connectors and optical fiber connector plug |
December 24, 2002 |
| The guide pin (P) in accordance with the present invention is a guide pin (P) having a predetermined pin diameter to be inserted into a guide pin insertion hole (9) of a ferrule (11); which is configured to have an inserting portion (31) penetrating through the ferrule (11), and an e |
| 6479559 |
Chlorinated vinyl chloride resin composition for siding extrusion molding and siding molded arti |
November 12, 2002 |
| There is obtained a chlorinated vinyl chloride resin composition from which a siding molded article having good appearance and excellent heat resistance, impact resistance and weatherability is obtained. A chlorinated vinyl chloride resin composition for siding extrusion molding is o |
| 5870418 |
Driving circuit of laser diode and optical transmission device |
February 9, 1999 |
| An optical transmission device which is used for a short range optical data link or an optical communication system for subscribers and more particularly requires no automatic optical power control minimizes the turn-on delay time of a laser diode and allows unformatted optical signal |
| 5801864 |
Optical frequency division multiplexing network |
September 1, 1998 |
| An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be |
| 5715339 |
Optical parallel transmission device |
February 3, 1998 |
| A parallel optical transmission device is disclosed, which comprises a transmitter section having one or a plurality of transmitter modules converting one or a plurality of input electric signals into optical signals; a section consisting of bundles of optical waveguides 20i, j trans |
| 5675685 |
Optical semiconductor array module, method of fabricating the module, and external board mountin |
October 7, 1997 |
| An optical semiconductor array module comprising an optical semiconductor array device constituted by a plurality of semiconductor laser diode, light-emitting diode elements or a plurality of semiconductor photo diode elements, an electronic device for driving and controlling the optical |
| 5675599 |
Driving circuit of laser diode and optical transmission device |
October 7, 1997 |
| An optical transmission device which is used for a short range optical data link or an optical communication system for subscribers and more particularly requires no automatic optical power control minimizes the turn-on delay time of a laser diode and allows unformatted optical signal |
| 5574289 |
Semiconductor optical integrated device and light receiver using said device |
November 12, 1996 |
| Disclosed is a semiconductor optical integrated device and method of fabricating the device, the device having a plurality of quantum well structures, formed on a single substrate, acting as optical waveguides, the plurality of quantum well structures respectively having different la |
| 5568576 |
Optical parallel transmission device |
October 22, 1996 |
| A parallel optical transmission device is disclosed, which comprises a transmitter section having one or a plurality of transmitter modules converting one or a plurality of input electric signals into optical signals; a section consisting of bundles of optical waveguides 20i, j trans |
| 5567961 |
Semiconductor device |
October 22, 1996 |
| A semiconductor device may include a double hetero junction bipolar transistor and a field-effect transistor. The base of the bipolar transistor and the gate of the field-effect transistor are connected to each other to serve as an input terminal and the collector of the bipolar tran |
| 5548399 |
Method and apparatus for testing a DC coupled optical receiver |
August 20, 1996 |
| A method of testing a DC coupled optical receiver is provided. DC light is superimposed on an optical signal, the power of DC light is changed to observe waveform at a light extinction level, and the measurement and the prediction of the bit error rate are performed. Similarly, in a |
| 5510921 |
Optical frequency division multiplexing network |
April 23, 1996 |
| An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be |
| 5448661 |
Optical parallel transmission device |
September 5, 1995 |
| A parallel optical transmission device is disclosed, which comprises a transmitter section having one or a plurality of transmitter modules converting one or a plurality of input electric signals into optical signals; a section consisting of bundles of optical waveguides 20i, j trans |
| 5363393 |
Surface emitting semiconductor laser |
November 8, 1994 |
| A surface emitting semiconductor laser of a laminated structure having at least a light emitting active layer sandwiched between a dielectric film multi-layer mirror and a p-type semiconductor multi-layer mirror on a semiconductor substrate. The energy .DELTA.Ec of conduction band di |
| 5321540 |
Optical frequency division multiplexing network |
June 14, 1994 |
| An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be |
| 5293084 |
High speed logic circuit |
March 8, 1994 |
| In a high speed logic circuit using a vertical hetero-junction bipolar transistor, in which two-dimensional carriers formed at a semiconductor hetero-junction interface are used as a base layer, the uppermost layer being a collector layer, the lowest layer being an emitter layer, two bas |
| 5282909 |
Aluminum alloy extrusion material with excellent chip separation property and precision of cut f |
February 1, 1994 |
| An Al alloy extrusion material for the fuel-distributing pipe of automobile, consisting essentially of 0.3 to 1.0 wt. % of Si, 0.1 to 0.5 wt. % of Cu, 0.6 to 1.5 wt. % of Mg, 0.3 to 1.0 wt. % of Sn, 0.005 to 0.03 wt. % of Ti and the balance of Al and inevitable impurities and having |
| 5263109 |
Optical transmission paths and methods of measuring their optical transmission times |
November 16, 1993 |
| An optical transmission time measuring device for an optical transmission path includes an optical bidirectional coupler having at least two input ports and at least two output ports. A pulse light source is connected to one of the input ports of the coupler and photodetector is connecte |
| 5263108 |
Electrical circuit apparatus |
November 16, 1993 |
| A connector is provided for connecting optic fibers to electrical circuit modules. The connector includes a plurality of fiber supporting means arrayed on a first surface of the connector base in a first direction. Supporting one end of a plurality of fiber sheets each comprised of a |
| 5130677 |
Signal termination circuit |
July 14, 1992 |
| A signal termination circuit comprising a resistor and a circuit network including two or more equivalent circuits connected in parallel to each other. The equivalent circuits respectively comprises resistors in the equivalent circuits, capacitors and inductances connected in series. The |
| 4972764 |
Combination of sliding members |
November 27, 1990 |
| In a combination of sliding members which are suitable for use in the compressor for an automotive air conditioner, one of the members consists of an aluminum alloy which contains silicone particles consisting solely of eutectic silicon; and the other sliding member consists of a fluorid |
| 4880289 |
Two-way optical transmission system |
November 14, 1989 |
| A two-way optical transmission system in which a plurality of light signals of wavelengths differing one from another are transmitted through a single optical fiber from one end thereof to the other end and from the other end to the one end. One or more assemblies each including an elect |
| 4759015 |
Ring network system for transmission of multicast information |
July 19, 1988 |
| In a network system wherein a plurality of terminal devices communicates with each other via respective node devices over a ring transmission line, a transmitting node device can confirm whether a multicast information transmission has succeeded or failed. The transmitting node device se |
| 4308596 |
Memory driving method |
December 29, 1981 |
| In a memory array of memory cells each having at least a gate, a substrate, a source and a drain, a writing operation is effected when the substrate and the source and drain are at the same potential and when a potential difference V.sub.p exists between the potential of the substrate an |
| 4270220 |
Electronic tuning type television receiver |
May 26, 1981 |
| A television receiver of electronic tuning type employing a variable capacitance diode in a local oscillator of its tuning circuit, which comprises a memory storing a plurality of digital data indicative of tuning voltages corresponding to a plurality of channels respectively so that |
