Wireless event-recording device with identification codes
US6806808B1 · kind B1 · utility
1,664Cited by
42References
56Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K3/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wireless recording device can be interrogated to determine its identity and its state. The state indicates whether a particular physical or chemical event has taken place. In effect, the physical or chemical event is recorded by the device. The identity of the device allows it to be distinguished from a number of similar devices. Thus the sensor device may be used in an array of devices that can be probed by a wireless interrogation unit. The device tells the interrogator who it is and what state it is in. The interrogator can thus easily identify particular items in an array that have reached a particular condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.