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Class Information
Number: 398/133
Name: Optical communications > Photophone > Specific transducer
Description: Subject matter including details of a light energy converting means device which converts an optical modulated light beam to a nonoptical energy signal (e.g., acoustic, electrical) are specified.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7391976 |
Optical acoustoelectric transducer |
Jun. 24, 2008 |
| 7286767 |
Optical transceiver over single communication link |
Oct. 23, 2007 |
| 7277642 |
Fine displacement detection device by sound or the like |
Oct. 2, 2007 |
| 7257327 |
Wireless communication system with high efficiency/high power optical source |
Aug. 14, 2007 |
| 7221875 |
Diaphragm structure of light-sound converter |
May. 22, 2007 |
| 7212749 |
Signal receiver having wide band amplification capability |
May. 1, 2007 |
| 7079717 |
Control circuit for IEEE 1394b optical transmission protocol |
Jul. 18, 2006 |
| 6721429 |
Electro-magnetic microphone |
Apr. 13, 2004 |
| 6424441 |
Method and apparatus for sensing an audio signal that is sensitive to the audio signal and insensitive to background noise |
Jul. 23, 2002 |
| 6301034 |
Pulsed laser microphone |
Oct. 9, 2001 |
| 6154551 |
Microphone having linear optical transducers |
Nov. 28, 2000 |
| 6147787 |
Laser microphone |
Nov. 14, 2000 |
| 6014239 |
Optical microphone |
Jan. 11, 2000 |
| 5910855 |
Passive acousto-optic modulator |
Jun. 8, 1999 |
| 5717774 |
Photothermal acoustic device |
Feb. 10, 1998 |
| 5694477 |
Photothermal acoustic device |
Dec. 2, 1997 |
| 5619583 |
Apparatus and methods for determining the relative displacement of an object |
Apr. 8, 1997 |
| 5333205 |
Microphone assembly |
Jul. 26, 1994 |
| 5060308 |
Firefighters mask communication system |
Oct. 22, 1991 |
| 4689827 |
Photofluidic audio receiver |
Aug. 25, 1987 |
| 4566135 |
Pressure transducer |
Jan. 21, 1986 |
| 4002897 |
Opto-acoustic telephone receiver |
Jan. 11, 1977 |
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