Participant response system employing battery powered, wireless remote units
US8639961B2 · kind B2 · utility
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2References
42Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 10, 2008 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Jun 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/33
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A participant response system (50) comprises at least one host computer (52) and a plurality of battery-powered remote units (62) communicating wirelessly with the host computer (52). Each remote unit (62) executes a diagnostic routine in response to a received status request broadcast by the host computer (52) to detect the status thereof. Any remote unit (62) that detects an unhealthy state, returns health information to the host computer (52).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.