Elevator floor registration button
USD253940S · kind S · design
7Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1977 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Jan 15, 1994 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.