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Class Information
Number: 398/134
Name: Optical communications > Photophone > Specific transducer > Including optical fiber or waveguide
Description: Subject matter wherein the transdu cer either is connected to or contains (a) a single or bundle of fiber used as a single transmission medium to propagate optical energy or (b) a system of material designed to confine direct optical waves in a direction determined by its physical boundary.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7444877 |
Optical waveguide vibration sensor for use in hearing aid |
Nov. 4, 2008 |
| 7257327 |
Wireless communication system with high efficiency/high power optical source |
Aug. 14, 2007 |
| 7082269 |
Interface circuit for a fiber transceiver |
Jul. 25, 2006 |
| 7079717 |
Control circuit for IEEE 1394b optical transmission protocol |
Jul. 18, 2006 |
| 7072475 |
Optically coupled headset and microphone |
Jul. 4, 2006 |
| 6993260 |
Interconnecting processing units of a stored program controlled system using free space optics |
Jan. 31, 2006 |
| 6700910 |
Wavelength tunable laser and optical device |
Mar. 2, 2004 |
| 6697575 |
System and method for increasing capacity of long-haul optical transmission systems |
Feb. 24, 2004 |
| 6671084 |
Optical amplifier |
Dec. 30, 2003 |
| 6671431 |
Optical transmission device and optical transmission system employing the same |
Dec. 30, 2003 |
| 6301034 |
Pulsed laser microphone |
Oct. 9, 2001 |
| 6266169 |
Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal |
Jul. 24, 2001 |
| 6147787 |
Laser microphone |
Nov. 14, 2000 |
| 6014239 |
Optical microphone |
Jan. 11, 2000 |
| 5995259 |
Bidirectional optical telecommunication system comprising a bidirectional optical amplifier |
Nov. 30, 1999 |
| 5357362 |
Optical telephone using optical modulator |
Oct. 18, 1994 |
| 5333205 |
Microphone assembly |
Jul. 26, 1994 |
| 5262884 |
Optical microphone with vibrating optical element |
Nov. 16, 1993 |
| 5146083 |
High temperature fiber optic microphone having a pressure-sensing reflective membrane under tensile stress |
Sep. 8, 1992 |
| 4882773 |
Audio microphone system with digital output and volume control feedback input |
Nov. 21, 1989 |
| 4789213 |
Electro-optical modulator having a monomode light waveguide modulator |
Dec. 6, 1988 |
| 4766607 |
Method of improving the sensitivity of the earphone of an optical telephone and earphone so improved |
Aug. 23, 1988 |
| 4641377 |
Photoacoustic speaker and method |
Feb. 3, 1987 |
| 4637071 |
Optical actuator |
Jan. 13, 1987 |
| 4596051 |
Optical interface to an electrical central office |
Jun. 17, 1986 |
| 4590620 |
Optical telephone |
May. 20, 1986 |
| 4479265 |
Laser microphone |
Oct. 23, 1984 |
| 4406003 |
Optical transmission system |
Sep. 20, 1983 |
| 4334321 |
Opto-acoustic transducer and telephone receiver |
Jun. 8, 1982 |
| 4284858 |
Dichroic transducer |
Aug. 18, 1981 |
| 4238856 |
Fiber-optic acoustic sensor |
Dec. 9, 1980 |
| 4162397 |
Fiber optic acoustic sensor |
Jul. 24, 1979 |
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