B41J 5/20
For subsidiary keys
Official title: for subsidiary keys, e.g. for shift keys
B41J5/20 (For subsidiary keys) appears on 4 US grants and 0 published applications in this corpus.
Search patents in B41J- Granted patents
- 4
- Published applications
- 0
- Assignees
- 2
- Inventors
- 7
- Latest grant
- 4 Oct 1983
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Case shift and lock input mechanism including a shift control switch4 Oct 1983US 4,407,596 ASCM Corporation
- Shift lock and position indicating torsion spring activated key switch7 Sep 1982US 4,348,122 A
- Secretarial shift mechanism for an electric keyboard13 Oct 1981US 4,295,012 AIllinois Tool Works Inc.
- Keyboard switch assembly having actuator interlocking keyboard shift and shift lock and release mechanism31 Jan 1978US 4,071,719 AIllinois Tool Works Inc.
No published applications in this class yet.
Most cited
By later US patents
- Shift lock and position indicating torsion spring activated key switch5US 4,348,122 A1982
- Secretarial shift mechanism for an electric keyboard4US 4,295,012 AIllinois Tool Works Inc. · 1981
- Keyboard switch assembly having actuator interlocking keyboard shift and shift lock and release mechanism3US 4,071,719 AIllinois Tool Works Inc. · 1978