H01H 2227/004
Membrane
H01H2227/004 (Membrane) appears on 31 US grants and 18 published applications in this corpus.
Search patents in H01H- Granted patents
- 31
- Published applications
- 18
- Assignees
- 27
- Inventors
- 59
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 3 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Key device1 Jul 2025US 12,347,632 B2Maintek Computer (Suzhou) Co., Ltd.
- Key switch device8 Oct 2019US 10,438,759 B2Lenovo (Singapore) Pte. Ltd.
- Key switch device and keyboard12 Dec 2017US 9,842,710 B2Fujitsu Component Limited
- Thin-film switch22 Aug 2017US 9,741,501 B2Jiangsu Transimage Technology Co., Ltd.
- Switch module30 Sep 2014US 8,847,090 B2Nippon Mektron, Ltd.
- Switch device20 Jun 2024US 2024/0203672 A1Nitto Denko Corporation
- Key device24 Aug 2023US 2023/0268145 A1Maintek Computer (Suzhou) Co., Ltd.
- Thin-film switch29 Jun 2017US 2017/0186565 A1Jiangsu Transimage Technology Co., Ltd.
- Mems structure with multilayer membrane23 Jun 2016US 2016/0181040 A1Delfmems
- Mems structure with thick movable membrane23 Jun 2016US 2016/0181041 A1Delfmems
Most cited
By later US patents
- Backlit tactile keyboard with improved tactile and electrical characteristics73US 5,138,119 ALucas Duralith Corporation · 1992
- Portable calculator58US 4,002,892 A1977
- Backlit tactile keyboard with improved tactile and electrical characteristics56US 5,149,923 ALucas Duralith Corporation · 1992
- Switches and keyboards45US 4,839,474 AKey Innovations Limited · 1989
- Capacitive sensing device for use in a keypad assembly37US 8,305,359 B2Synaptics Incorporated · 2012