Transmitting and receiving apparatus
US4002860A · kind A · utility
12Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Apr 2, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6033
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Only one reversible electro-acoustic converter is used to act without a press-to-talk switch or the like as a transmitter and a receiver. The electro-acoustic converter is connected to a communication line through two 2 - 4 converters in the form of hybrid transformers which are interconnected to form a transmitting system and a receiving system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.