| |
 |
|
Class Information
Number: 181/22
Name: Acoustics > Speaking tubes > Tubes
Description: The construction of the tubes, per se.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7522743 |
High comfort sound delivery system |
Apr. 21, 2009 |
| 6705319 |
Miniature acoustical guidance and monitoring system for tube or catheter placement |
Mar. 16, 2004 |
| 6674870 |
Adjustable sound capturing device (MICTUBZ) |
Jan. 6, 2004 |
| 6160895 |
Hearing aid system with acoustical horn |
Dec. 12, 2000 |
| 5827173 |
Prenatal audio communication device |
Oct. 27, 1998 |
| 4926961 |
Hinged acoustical voice tube |
May. 22, 1990 |
| 4768612 |
Fetal communication device |
Sep. 6, 1988 |
| 4683587 |
Submersible personal stereo |
Jul. 28, 1987 |
| 4579193 |
Acoustic connector |
Apr. 1, 1986 |
| 4539983 |
Respirator speech transmitter |
Sep. 10, 1985 |
| 4537276 |
Mask/microphone system for voice actuated control |
Aug. 27, 1985 |
| 4527657 |
Tapered tube impedance matching underwater voice communicator with bubble silencer |
Jul. 9, 1985 |
| 4473130 |
Crash helmet with communication system |
Sep. 25, 1984 |
| 4451709 |
Eye glass hearing aids |
May. 29, 1984 |
| 4442515 |
Multiplex transmission medium for application in multiplex vehicle control systems |
Apr. 10, 1984 |
|
|
|
