Electronic visual display system for simulating the motion of a clock pendulum
US4939709A · kind A · utility
1Cited by
1References
2Claims
0Family size
Inventor
Key dates
| Filing date | Jun 15, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jun 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A visual device for simulating the motion of a clock pendulum consisting of a series of light emitting diodes having the property of emitting two distinct colors and electronic logic arranged to activate sequentially the series in one color in one direction and in the other color in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.