发明名称 |
Two way device free communications system |
摘要 |
A two way communication system that does not require the use of a device by one of the communicators. The system employs an audio spotlight to project a signal to a specific location, where one person is, and a laser audio receiver to receive the response. Both the audio spotlight and the laser audio receiver are directed by a user seeking to communicate with the person at long range.
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申请公布号 |
US2008130919(A1) |
申请公布日期 |
2008.06.05 |
申请号 |
US20060607580 |
申请日期 |
2006.12.01 |
申请人 |
WHILLOCK RAND P;COCHRAN EDWARD L |
发明人 |
WHILLOCK RAND P.;COCHRAN EDWARD L. |
分类号 |
H04R3/00;H04B3/00 |
主分类号 |
H04R3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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