Projection clock
US7149152B1 · kind B1 · utility
34Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2005 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Aug 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A projection clock includes a base unit that includes a power supply, a clock circuit powered by the power supply, and a wireless transmitter for wirelessly transmitting time information provided by the clock circuit. Also, a projection unit, separate from the base unit, includes a projection circuit and a wireless receiver for wirelessly receiving the transmitted time information, based on which the projection circuit operatively projects the time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.