H01T 4/12
Hermetically sealed
Official title: hermetically sealed
H01T4/12 (Hermetically sealed) appears on 236 US grants and 187 published applications in this corpus.
Search patents in H01T- Granted patents
- 236
- Published applications
- 187
- Assignees
- 81
- Inventors
- 379
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 4 |
| 2002 | 4 | 7 |
| 2003 | 6 | 4 |
| 2004 | 6 | 7 |
| 2005 | 4 | 3 |
| 2006 | 3 | 3 |
| 2007 | 0 | 7 |
| 2008 | 3 | 7 |
| 2009 | 4 | 4 |
| 2010 | 6 | 6 |
| 2011 | 5 | 9 |
| 2012 | 3 | 6 |
| 2013 | 11 | 9 |
| 2014 | 6 | 19 |
| 2015 | 9 | 12 |
| 2016 | 13 | 14 |
| 2017 | 17 | 10 |
| 2018 | 6 | 15 |
| 2019 | 18 | 8 |
| 2020 | 7 | 10 |
| 2021 | 12 | 6 |
| 2022 | 5 | 3 |
| 2023 | 5 | 3 |
| 2024 | 3 | 7 |
| 2025 | 2 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spark gaps with high current capability for electrical overstress detection and protection25 Aug 2026US 12,719,242 B2Analog Devices International Unlimited Company
- Gas-filled spark gap with high follow current extinction capacity31 Mar 2026US 12,592,549 B2Citel
- Protection device against pulsed currents10 Mar 2026US 12,573,819 B2Citel
- Overvoltage protection spark gap assembly and method for operating an overvoltage protection spark gap assembly7 Oct 2025US 12,438,355 B2Dehn SE
- Triggered vacuum gap that controllably sustains a vacuum arc through current zeros21 Jan 2025US 12,205,784 B2S&C Electric Company
- Transient voltage protection device13 Aug 2026US 2026/0237560 A1TDK Corporation
- Gas-filled spark gap18 Dec 2025US 2025/0385488 A1Citel
- Transient voltage protection device18 Dec 2025US 2025/0385514 A1TDK Corporation
- Spark gaps with multiple trigger voltages for electrical overstress detection and protection23 Jan 2025US 2025/0030237 A1Analog Devices International Unlimited Company
- Array of spark gaps for electrical overstress detection and protection5 Dec 2024US 2024/0405517 A1Analog Devices International Unlimited Company
Most cited
By later US patents
- Surge arrester with shunt gap41US 4,908,730 AKearney · 1990
- Surge absorber36US 4,727,350 A1988
- Coaxial transmission line surge arrestor with fusible link30US 5,724,220 ATII Industries, Inc. · 1998
- Coaxial transmission line surge arrestor26US 5,566,056 ATII Industries, Inc. · 1996
- Gas-filled surge arrester, activating compound, ignition stripes and method therefore24US 7,643,265 B2Littelfuse, Inc. · 2010