Lock cylinder
US7073360B2 · kind B2 · utility
2Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2005 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Apr 18, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7712
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lock cylinder having a master key capability wherein the lock cylinder can be provided with either a master annular ring on the front of the lock plug which can only be opened by a master key or a low level security annular ring which permits the lock cylinder to be opened by either the master key or the low level security key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.