Dynamic security device
US10921579B2 · kind B2 · utility
1Cited by
9References
18Claims
0Family size
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Key dates
| Filing date | Dec 23, 2015 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Mar 27, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/38
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A security device that elicits at least one dynamic response upon acceleration, or upon change of orientation with respect to gravity, wherein the dynamic response continues after cessation of the acceleration or the change of orientation. In addition, the dynamic response can be optical, such that it is visually observable by an unaided human eye. Alternatively, the response can be machine readable. In some cases, the dynamic response has duration of from about 0.01 s to about 100 s, or from about Is to about 10 s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.