Magnetic card-operated electronic door lock
USD288899S · kind S · design
11Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Mar 24, 2001 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.