Call button indicator and wall plate for elevators
USD318632S · kind S · design
17Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1989 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Jul 30, 2005 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.