H01H 2221/004
U-shaped openings surrounding keys
H01H2221/004 (U-shaped openings surrounding keys) appears on 54 US grants and 55 published applications in this corpus.
Search patents in H01H- Granted patents
- 54
- Published applications
- 55
- Assignees
- 47
- Inventors
- 132
- Latest grant
- 21 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 6 |
| 2006 | 2 | 4 |
| 2007 | 5 | 8 |
| 2008 | 4 | 9 |
| 2009 | 1 | 9 |
| 2010 | 6 | 7 |
| 2011 | 6 | 4 |
| 2012 | 3 | 1 |
| 2013 | 3 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 2 | 2 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Actuating unit for an electric switching element21 Jan 2025US 12,205,780 B2ABB AB
- Slim-type keyboard26 Dec 2017US 9,852,854 B1Primax Electronics Ltd.
- Capacitive sensitive key structure7 Nov 2017US 9,813,059 B2
- Electronic communication device and method24 Sep 2013US 8,541,705 B2Strattec Security Corporation
- Electrophoretic display keypad structure14 May 2013US 8,441,445 B2Ichia Technologies, Inc.
- Actuating Unit for an Electric Switching Element8 Sep 2022US 2022/0285106 A1ABB AB
- Slim-type keyboard14 Dec 2017US 2017/0358407 A1Primax Electronics Ltd.
- Capacitive sensitive key structure20 Apr 2017US 2017/0111044 A1
- Handheld medicament delivery device with dose button27 Mar 2014US 2014/0088504 A1Sanofi-Aventis Deutschland GmbH
- Keyboard with plate-type keycap assembly28 Jun 2012US 2012/0160652 A1
Most cited
By later US patents
- Thin keyboard switch assembly with hinged actuator mechanism120US 5,874,697 AInternational Business Machines Corporation · 1999
- Thin keyboard having torsion bar keyswitch hinge members119US 6,005,209 AInternational Business Machines Corporation · 1999
- Keyboard actuator device and keyboard incorporating the device72US 4,323,740 ARogers Corporation · 1982
- Metallic housing for an electronic apparatus with a flat keyboard56US 4,338,502 ASharp Kabushiki Kaisha · 1982
- Keyboard switch52US 4,503,294 ANippon Mektron, Ltd. · 1985