H01T 4/04
Housings
Official title: Housings (H01T4/06 takes precedence)
H01T4/04 (Housings) appears on 97 US grants and 74 published applications in this corpus.
Search patents in H01T- Granted patents
- 97
- Published applications
- 74
- Assignees
- 63
- Inventors
- 236
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 3 | 3 |
| 2009 | 2 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 4 |
| 2013 | 2 | 1 |
| 2014 | 1 | 4 |
| 2015 | 4 | 6 |
| 2016 | 5 | 3 |
| 2017 | 2 | 5 |
| 2018 | 2 | 3 |
| 2019 | 7 | 6 |
| 2020 | 3 | 9 |
| 2021 | 11 | 7 |
| 2022 | 5 | 2 |
| 2023 | 3 | 5 |
| 2024 | 3 | 6 |
| 2025 | 7 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Modular surge protection device (SPD)11 Nov 2025US 12,470,056 B2Xiamen Set Electronics Co., Ltd
- Conductor assembly21 Oct 2025US 12,451,276 B2Siemens Energy Global GmbH & Co. KG
- Surge protective devices16 Sep 2025US 12,418,175 B2Ripd IP Development Ltd
- Surge arrester4 Jun 2026US 2026/0155634 A1Streamer, Electric Company Inc.
- Surge protection device, transmitter, surge protection system, and intercommunication transmitter19 Mar 2026US 2026/0081418 A1Yokogawa Electric Corporation
- Surge protective devices11 Dec 2025US 2025/0379441 A1Ripd IP Development Ltd
- Device for protection against overvoltages, as well as electrical installation comprising such a protection device24 Apr 2025US 2025/0132555 A1Schneider Electric Industries SAS
- High voltage bypass device, voltage source converter and operating method3 Apr 2025US 2025/0112013 A1Hitachi Energy Ltd
Most cited
By later US patents
- Voltage surge protector73US 4,794,485 AMaida Development Company · 1988
- Surge arrester assembly41US 4,493,003 AGTE Products Corporation · 1985
- Surge arrester having a non-fragmenting outer housing40US 4,404,614 AElectric Power Research Institute, Inc. · 1983
- Plug protector38US 5,034,846 A1991
- Polymeric weathershed surge arrester and method30US 6,225,567 B1McGraw-Edison Company · 2001