| 发明名称 |
Door-mounted combination intercom and viewer |
| 摘要 |
An improved door-mounted combination intercom and viewer is provided including a pair of identical housings, each having a microphone and a speaker therein. The microphones are isolated from contact with the housings by a vibration damping material to prevent feedback.
|
| 申请公布号 |
US4584436(A) |
申请公布日期 |
1986.04.22 |
| 申请号 |
US19840604477 |
申请日期 |
1984.04.27 |
| 申请人 |
CLAIBORNE ELECTRONICS, INC. |
发明人 |
BOENNING, CHARLES B.;MOORMAN, CHARLES J. |
| 分类号 |
H04M1/02;(IPC1-7):H04M9/00 |
主分类号 |
H04M1/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
