Lock arrangement employing mechanically acting code card and key card
US5343724A · kind A · utility
9Cited by
8References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | May 7, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7751
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a locking apparatus that utilizes bores and blocking pins along with key cards and code cards to unlock the lock, a master card key is employed with holes in all of the master card bores and balls are used instead of blocking pins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.