Watch
US11422509B2 · kind B2 · utility
1Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2018 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Aug 20, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B39/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A skeleton watch includes a horological movement housed in a watch case, the horological movement being arranged to rotate at least one hand, the horological movement being covered by a dial, and the dial being disposed between the horological movement and the at least one hand. The dial includes a photochromic plate so that the horological movement is visible when the photochromic plate is exposed to an amount of UV radiation below a first threshold value and the horological movement is masked when the photochromic plate is exposed to an amount of UV radiation above a second threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.