Transmitting device of signal sequences
US5216716A · kind A · utility
11Cited by
6References
8Claims
0Family size
Inventor
Key dates
| Filing date | Oct 16, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Oct 16, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00801
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Transmitting device of sequences of acoustic signals. The device comprises a transducer, a generator, a micrologic unit, a memory, a battery and a control means. The device transmits sequences that differ from one transmission to the next. The device has application to an electronic payment method by telephone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.