Variable distance marker
US5532677A · kind A · utility
16Cited by
12References
19Claims
0Family size
Inventor
Key dates
| Filing date | Jul 1, 1994 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Jul 1, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2225/74
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A variable distance marker system includes a display mounted in a housing and attached to electronics circuits having a light detector for receiving externally generated light signals. A rechargeable battery and a solar cell array are interconnected for supplying power to the display and circuits. An antenna is mounted in the housing for receiving RF signals and a remote RF transmitter is controllable to transmit an actuating signal to the antenna for altering the display. A remote hand-held light generator is controllable to generate a beam of light onto the light detector for controlling the digits displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.