H02H 9/026
Current limitation using ptc resistors, i.e. resistors with a large positive temperature
Official title: {Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient}
H02H9/026 (Current limitation using ptc resistors, i.e. resistors with a large positive temperature) appears on 232 US grants and 153 published applications in this corpus.
Search patents in H02H- Granted patents
- 232
- Published applications
- 153
- Assignees
- 150
- Inventors
- 445
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 12 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 1 |
| 2002 | 11 | 4 |
| 2003 | 6 | 4 |
| 2004 | 2 | 5 |
| 2005 | 2 | 7 |
| 2006 | 7 | 3 |
| 2007 | 2 | 1 |
| 2008 | 1 | 0 |
| 2009 | 2 | 1 |
| 2010 | 0 | 6 |
| 2011 | 1 | 1 |
| 2012 | 4 | 9 |
| 2013 | 5 | 9 |
| 2014 | 5 | 3 |
| 2015 | 6 | 7 |
| 2016 | 8 | 10 |
| 2017 | 7 | 9 |
| 2018 | 5 | 11 |
| 2019 | 16 | 13 |
| 2020 | 10 | 8 |
| 2021 | 8 | 10 |
| 2022 | 7 | 7 |
| 2023 | 11 | 12 |
| 2024 | 6 | 1 |
| 2025 | 6 | 7 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Surface-mounted polymer PCT overcurrent protection element having small package size14 Apr 2026US 12,603,198 B2Shanghai Wayon Electronics Co., Ltd.
- Power supply control device having a switch that varies according to an ambient temperature17 Feb 2026US 12,556,019 B2Autonetworks Technologies, Ltd.
- Single-phase AC motor with a relay function10 Feb 2026US 12,549,076 B2Motor Competence Center Holding Flensburg GmbH
- Low resistance, high voltage and resistance stable PPTC material and manufacturing20 Jan 2026US 12,531,172 B2Littelfuse, Inc.
- Positive temperature coefficient composition16 Dec 2025US 12,501,519 B2Henkel AG & Co. KGaA
- Circuit protection device2 Jul 2026US 2026/0188999 A1Smart Electronics Inc.
- Dc energy-consuming apparatus and control method, apparatus thereof and storage medium11 Jun 2026US 2026/0163364 A1Electric Power Research Institute. China Southern Power Grid
- Over-current protection devicection device4 Jun 2026US 2026/0155282 A1Polytronics Technology Corp.
- Protection device including ptc and thermal devices29 Jan 2026US 2026/0031257 A1Littelfuse, Inc.
- Battery stress relief system with bypass12 Jun 2025US 2025/0192578 A1Yazaki North America, Inc.
Most cited
By later US patents
- PTC thermistor and a current limiter device having at least one PTC thermistor176US 6,094,129 ADaimlerChrysler AG · 2000
- Current limiting device117US 5,614,881 AGeneral Electric Company · 1997
- Polymer fuse and filter apparatus103US 6,806,806 B2X2Y Attenuators, LLC · 2004
- Polymer fuse and filter apparatus82US 6,157,528 AX2Y Attenuators, LLC · 2000
- Use of PTC devices80US 5,645,746 ARaychem Corporation · 1997