H01H 83/144
With differential transformer
Official title: {with differential transformer}
H01H83/144 (With differential transformer) appears on 151 US grants and 122 published applications in this corpus.
Search patents in H01H- Granted patents
- 151
- Published applications
- 122
- Assignees
- 75
- Inventors
- 263
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 4 |
| 2003 | 3 | 1 |
| 2004 | 4 | 2 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 3 |
| 2008 | 6 | 4 |
| 2009 | 3 | 0 |
| 2010 | 1 | 4 |
| 2011 | 2 | 2 |
| 2012 | 3 | 5 |
| 2013 | 2 | 4 |
| 2014 | 4 | 6 |
| 2015 | 6 | 3 |
| 2016 | 1 | 4 |
| 2017 | 2 | 10 |
| 2018 | 7 | 13 |
| 2019 | 11 | 12 |
| 2020 | 15 | 4 |
| 2021 | 6 | 5 |
| 2022 | 6 | 5 |
| 2023 | 8 | 5 |
| 2024 | 3 | 9 |
| 2025 | 8 | 3 |
| 2026 | 0 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Plug-in summation current transformer module, rail-mounted device, and assembly method7 Oct 2025US 12,437,950 B2Siemens Aktiengesellschaft
- Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) system and method9 Sep 2025US 12,413,027 B2Hubbell Incorporated
- Circuit interrupting device having printed circuit board coils12 Aug 2025US 12,387,884 B2Hubbell Incorporated
- Self-test mechanisms for end-of-life detection and response for circuit interrupter devices22 Jul 2025US 12,368,015 B2
- Ground fault circuit interrupter (GFCI) devices, systems, and methods17 Jun 2025US 12,334,722 B2Schneider Electric USA, Inc.
- System on sensor electrical protective device30 Jul 2026US 2026/0221365 A1Schneider Electric USA, Inc.
- Combined leakage protection device7 May 2026US 2026/0128247 A1
- Ground fault detection circuit breaker7 May 2026US 2026/0128248 A1
- Self-test mechanisms for end-of-life detection and response for circuit interrupter devices16 Apr 2026US 2026/0106102 A1
- Magnetic wrap up effects screening2 Apr 2026US 2026/0092954 A1Schneider Electric USA, Inc.
Most cited
By later US patents
- Fail safe fault interrupter144US 6,262,871 B1X-L Synergy · 2001
- Ground fault current protective device87US 4,937,706 AMerlin Gerin · 1990
- Switch mechanism79US 5,517,165 APDL Holdings Limited · 1996
- Electrical receptacle mounted ground fault interrupter with automatic plug insertion testing58US 4,002,951 ACutler-Hammer, Inc. · 1977
- Ground fault circuit interrupter55US 4,630,015 ASlater Electric Inc. · 1986