Loop data link
US4714925A · kind A · utility
58Cited by
11References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1985 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096783
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Data stored in a logger is transmitted from a vehicle by a responder. The data is received by a transceiver and stored in a device. Data can also be transferred in the reverse direction. An inductive loop is used to sense the presence of the vehicle and, when the vehicle is sensed, to initiate an interrogation of the vehicle. Data transfer takes place only if the vehicle is identified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.