Ink ribbon cassette for electronic typewriter
USD307436S · kind S · design
5Cited by
10References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1986 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Apr 24, 2004 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.