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Class Information
Number: 381/344
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Sound intensifying or spreading element > Mouthpiece
Description: Subject matter wherein the modifying element is designed for use close to the mouth of a person speaking into a microphone.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6072887 |
Receiver-transmitter of communication equipment |
Jun. 6, 2000 |
| 6038327 |
Electroacoustic transducer comprising a closing member for closing the rear volume of the transducer |
Mar. 14, 2000 |
| 5905803 |
Flush-porting method and device for reduction of wind-induced noise in a microphone |
May. 18, 1999 |
| 5890072 |
Radiotelephone having a non-resonant wave guide acoustically coupled to a microphone |
Mar. 30, 1999 |
| 5802198 |
Hermetically sealed condenser microphone |
Sep. 1, 1998 |
| 5719935 |
Cellular telephone |
Feb. 17, 1998 |
| 5701354 |
Telephone mouthpiece for preventing wind noises and method for reducing wind noises input thereto |
Dec. 23, 1997 |
| 5574794 |
Microphone assembly for adhesive attachment to a vibratory surface |
Nov. 12, 1996 |
| 5428688 |
Voice transmission system with remote microphone |
Jun. 27, 1995 |
| 5371804 |
Voice transmission system |
Dec. 6, 1994 |
| 5339364 |
Device for conversion between electrical oscillations and acoustic waves |
Aug. 16, 1994 |
| 5231659 |
Telephone handset with transducer assembly |
Jul. 27, 1993 |
| 5159641 |
Microphone circuit control mechanism for breathing apparatus |
Oct. 27, 1992 |
| 5144656 |
Transmitter for communication equipment |
Sep. 1, 1992 |
| 5138666 |
Voice transmission system |
Aug. 11, 1992 |
| 4920564 |
Moisture barrier assembly |
Apr. 24, 1990 |
| 4901356 |
Voice transmission system |
Feb. 13, 1990 |
| 4852682 |
Underwater voice communicator |
Aug. 1, 1989 |
| 4803724 |
Hand set |
Feb. 7, 1989 |
| 4799263 |
Speaking and hearing system for breathing apparatus |
Jan. 17, 1989 |
| 4796288 |
Telephone handset with static discharge prevention |
Jan. 3, 1989 |
| 4752961 |
Microphone arrangement |
Jun. 21, 1988 |
| 4617431 |
Voice tube assemblies for post-auricle headsets |
Oct. 14, 1986 |
| 4594478 |
Transmitter assembly for a telephone handset |
Jun. 10, 1986 |
| 4424419 |
Electret microphone shield |
Jan. 3, 1984 |
| 4263484 |
Microphone unit |
Apr. 21, 1981 |
| 4123622 |
Protective cover for sound transducers located in face masks of divers |
Oct. 31, 1978 |
| 4072831 |
Voice transmitting apparatus for a breathing mask |
Feb. 7, 1978 |
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