| Patent Number |
Title Of Patent |
Date Issued |
| RE37621 |
Optical communication transmission system |
April 2, 2002 |
| An optical communication transmission system including an optical amplifier lumped repeater system of the present invention includes, for the purpose of preventing degradation of the transmission characteristic arising from wavelength dispersion of optical fibers due to raised power of t |
| 6509988 |
IEEE serial bus physical layer interface having a speed setting circuit |
January 21, 2003 |
| A physical layer interface for an IEEE-1394 serial bus node includes multiple port transceivers connected to respective serial buses. A controller, connected to a link layer and the port transceivers, supplies control signals to an encoder/decoder for performing data conversion betwe |
| 6275889 |
Connection control apparatus |
August 14, 2001 |
| There is provided a connection control apparatus which, even when a plurality of such connection control apparatuses are connected to a bus such as the 1394 bus through which packet-based bidirectional serial communication is possible and to which a plurality of AV devices can be con |
| 5835270 |
Optical isolator device |
November 10, 1998 |
| An optical isolator device is provided which is free from polarization dispersion. The optical isolator device presents an optical path which is equidistant for both an ordinary ray and an extraordinary ray. The optical isolator device of the present invention comprises a first and secon |
| 5822104 |
Digital optical receiving apparatus |
October 13, 1998 |
| An output signal of an opto-electric conversion element 1 is amplified by a differential type pre-amplifier 3 to a predetermined level and input to an ATC circuit 5 as a positive phase signal and an inverted phase signal. These signals are held in respective peak holding circuits 51 and |
| 5675429 |
Optical communication transmission system |
October 7, 1997 |
| An optical communication transmission system including an optical amplifier lumped repeater system of the present invention includes, for the purpose of preventing degradation of the transmission characteristic arising from wavelength dispersion of optical fibers due to raised power of t |
| 5526174 |
Optical amplification system |
June 11, 1996 |
| In an optical amplification system of the present invention, an ASE (amplified spontaneous emission) light included in a signal light band is removed to provide low noise characteristics. The signal light is amplified by an optical amplification unit, and is supplied to an ASE remova |
| 5457559 |
Apparatus for extracting an optical clock and apparatus for demultiplexing a time-division multi |
October 10, 1995 |
| A signal light and a clock light which is generated by a clock light generator are propagated through a non-linear optical medium of, for instance, a silica based single mode optical fiber, from which the signal and clock lights and a four-wave mixing light are obtained. One light, for |
| 5348577 |
Antibacterial calcium tertiary phosphate |
September 20, 1994 |
| A calcium tertiary phosphate is used as a carrier, and the carrier is caused to carry silver and zinc. The result is an antibacterial ceramic exhibiting an ultra high degree of whiteness and suppressed discoloration. This material may be heat fired at a temperature above 960.degree. C. t |
| 5266534 |
Antibacterial calcium phosphate ceramic |
November 30, 1993 |
| A calcium phosphate ceramic such as hydroxyapatite or calcium tertiary phosphate or calcium carbonate is used as a carrier, and the carrier is caused to carry silicon in addition to silver, or silicon and zinc in addition to silver. The result is an antibacterial ceramic exhibiting an |
| 5184243 |
Optical transmitting apparatus for minimal dispersion along an optical fiber |
February 2, 1993 |
| A plurality of transmitting signal lights are supplied from a semiconductor laser light source which is modulated by a current having adjusted amplitude and phase injected thereinto in an optical transmitting apparatus. The signal lights are modulated in intensity by a plurality of e |
| 5151122 |
Process for producing an antibacterial ceramic material |
September 29, 1992 |
| An antibacterial ceramic material wherein at least one ceramic selected from the group consisting of hydroxyapatite, calcium phosphate, calcium hydrogen phosphate, calcium carbonate, calcium silicate and zeolite is made to absorb and tightly retain at least one liquified metal salt s |
