Rotatable transparent disc second hand for watch
US3934405A · kind A · utility
9Cited by
4References
4Claims
0Family size
Inventor
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece is disclosed which has a single transparent disc coaxially mounted within a case. The disc which carries a reference mark serves as a rotatable second hand. The disc is mounted on a central spindle in a unique manner for optimum balance and trouble-free operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.