Timepiece communication system
US4800543A · kind A · utility
113Cited by
4References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Dec 3, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07G1/0036
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A wristwatch contains communication and memory circuitry and a transmitter. The memory circuit stores a personal identification number of a single user. The communication and memory circuitry is driven by the same battery which powers the timekeeping structure of the watch. A transmitter transmits data from the reader to the wristwatch, placed proximate thereto. The reader has a keypad by which the user can enter a personal identification number, and the watch compares the transmitted number to the user-entered number. If the numbers match, a transaction may occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.