Control switch apparatus operable by an object placed adjacent thereto and spaced therefrom
US5977878A · kind A · utility
13Cited by
11References
16Claims
0Family size
Inventor
Key dates
| Filing date | Oct 2, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Oct 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/941
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A "no touch", two state switch is controlled by light emitted thereby which is reflected back to the switch to actuate or deactuate the switch when reflected by a hand or other object spaced from but adjacent to the switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.