Keyless entry system
US5204672A · kind A · utility
Inventor
Key dates
| Filing date | Jan 14, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Jan 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/65
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A keyless entry system is provided for locked or disabled items. A transmitter carried by a person generates a signal with a predetermined frequency characteristic such that the generated signal is transmitted through the carrier's body. There is a receiver apparatus including a detector for detecting a signal with the predetermined frequency characteristic and a mechanism that is engageable by the carrier's body for providing signals transmitted through the body to the detector. When such signals are detected, a circuit is activated to unlock or enable the item. An alarm system may be provided which sounds under certain predetermined conditions and a latching mechanism may be utilized to disarm the alarm under certain conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.