H01H 29/00
Switches having at least one liquid contact
Official title: Switches having at least one liquid contact (solid contacts wetted or soaked with mercury H01H1/08)
H01H29/00 (Switches having at least one liquid contact) appears on 350 US grants and 201 published applications in this corpus.
Search patents in H01H- Granted patents
- 350
- Published applications
- 201
- Assignees
- 117
- Inventors
- 383
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 10 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 9 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 1 |
| 2002 | 11 | 10 |
| 2003 | 10 | 13 |
| 2004 | 42 | 50 |
| 2005 | 39 | 23 |
| 2006 | 19 | 14 |
| 2007 | 11 | 10 |
| 2008 | 3 | 10 |
| 2009 | 5 | 4 |
| 2010 | 1 | 4 |
| 2011 | 5 | 4 |
| 2012 | 4 | 2 |
| 2013 | 9 | 4 |
| 2014 | 3 | 10 |
| 2015 | 7 | 4 |
| 2016 | 6 | 4 |
| 2017 | 2 | 9 |
| 2018 | 5 | 6 |
| 2019 | 6 | 4 |
| 2020 | 4 | 3 |
| 2021 | 4 | 2 |
| 2022 | 1 | 0 |
| 2023 | 3 | 4 |
| 2024 | 3 | 2 |
| 2025 | 3 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 2029/008Switches having at least one liquid contact: using micromechanicsIndexing code161
- H01H 29/20Operated by tilting contact-liquid container91
- H01H 29/28Switches having at least one liquid contact: with level of surface of77
- H01H 29/02Details60
- H01H 29/002Inertia switches37
- H01H 29/004Operated by deformation of container12
- H01H 29/18Switches having at least one liquid contact: with level of surface of9
- H01H 29/26Switches having at least one liquid contact: with level of surface of4
Recent patents
- Stabilized liquid-solid electrical contact21 Oct 2025US 12,451,309 B2Atomic Machines, Inc.
- High voltage bypass device, voltage source converter and operating method2 Sep 2025US 12,406,821 B2Hitachi Energy Ltd
- Stabilized liquid-solid electrical contact22 Jul 2025US 12,368,012 B1Atomic Machines, Inc.
- Contactless credit card: flex to activate26 Nov 2024US 12,154,096 B2Capital One Services, LLC
- Liquid metal MEMS switch23 Jul 2024US 12,046,430 B2Texas Instruments Incorporated
- Stabilized liquid-solid electrical contact29 Jan 2026US 2026/0031293 A1Atomic Machines, Inc.
- Liquid contactors for power systems21 Aug 2025US 2025/0266223 A1Caterpillar Inc.
- Stabilized liquid-solid electrical contact17 Jul 2025US 2025/0232932 A1Atomic Machines, Inc.
- High voltage bypass device, voltage source converter and operating method3 Apr 2025US 2025/0112013 A1Hitachi Energy Ltd
- Stabilized liquid-solid electrical contact5 Dec 2024US 2024/0404772 A1Atomic Machines, Inc.
Most cited
By later US patents
- Apparatus, and method for propelling fluids192US 6,453,928 B1NanoLab, Inc. · 2002
- Object oriented microfluidic design method and system162US 6,885,982 B2Fluidigm Corporation · 2005
- Microfluidic design automation method and system134US 6,829,753 B2Fluidigm Corporation · 2004
- Microfluidic design automation method and system132US 7,526,741 B2Fluidigm Corporation · 2009
- Pistol grip controller131US 4,425,488 A1984