H01H 2221/036
Return force
H01H2221/036 (Return force) appears on 537 US grants and 500 published applications in this corpus.
Search patents in H01H- Granted patents
- 537
- Published applications
- 500
- Assignees
- 301
- Inventors
- 1,034
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 6 |
| 2002 | 9 | 6 |
| 2003 | 6 | 13 |
| 2004 | 11 | 9 |
| 2005 | 6 | 13 |
| 2006 | 12 | 10 |
| 2007 | 8 | 8 |
| 2008 | 5 | 15 |
| 2009 | 6 | 19 |
| 2010 | 8 | 13 |
| 2011 | 12 | 17 |
| 2012 | 13 | 25 |
| 2013 | 20 | 20 |
| 2014 | 16 | 38 |
| 2015 | 30 | 48 |
| 2016 | 44 | 35 |
| 2017 | 39 | 32 |
| 2018 | 35 | 28 |
| 2019 | 30 | 23 |
| 2020 | 44 | 41 |
| 2021 | 25 | 14 |
| 2022 | 18 | 17 |
| 2023 | 21 | 19 |
| 2024 | 13 | 15 |
| 2025 | 15 | 7 |
| 2026 | 3 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Trigger switch22 Sep 2026US 12,744,170 B2OMRON Corporation
- Key structure14 Apr 2026US 12,603,236 B2Acer Incorporated
- Wall intelligent switch, wireless intelligent switch and switch mounting frame24 Feb 2026US 12,562,325 B2Wuhan Linptech Co., Ltd.
- Switch button for an endoscope23 Dec 2025US 12,504,617 B2Ambu A/S
- Electronic device4 Nov 2025US 12,462,992 B2Sony Interactive Entertainment Inc.
- Key structure1 Oct 2026US 2026/0302103 A1Logitech Europe S. A.
- Pressing Feedback Apparatus and Method, and Electronic Device10 Sep 2026US 2026/0267419 A1Honor Device Co., Ltd.
- Waterproof panel and switch assembly10 Sep 2026US 2026/0269152 A1Shanghai Shift Electrics Co., Ltd.
- Key structure6 Aug 2026US 2026/0229426 A1Darfon Electronics Corp.
- Keyboard and keyswitch structure thereof21 May 2026US 2026/0142099 A1Darfon Electronics Corp.
Most cited
By later US patents
- Transparent keyboard switch and array133US 4,017,848 ARockwell International Corporation · 1977
- Key for flexible keyboard130US 5,666,112 A1997
- RF antenna integrated into a control device installed into a wall switch box127US 7,756,556 B2Leviton Manufacturing Co., Inc. · 2010
- Thin keyboard having torsion bar keyswitch hinge members119US 6,005,209 AInternational Business Machines Corporation · 1999
- Membrane switch119US 6,600,121 B1Think Outside, Inc. · 2003