H01C 7/02
Non-adjustable resistors formed as one or more layers or coatings: having positive
Official title: having positive temperature coefficient
H01C7/02 (Non-adjustable resistors formed as one or more layers or coatings: having positive) appears on 1,073 US grants and 765 published applications in this corpus.
Search patents in H01C- Granted patents
- 1,073
- Published applications
- 765
- Assignees
- 372
- Inventors
- 1,845
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 9 | 0 |
| 1978 | 13 | 0 |
| 1979 | 11 | 0 |
| 1980 | 18 | 0 |
| 1981 | 14 | 0 |
| 1982 | 19 | 0 |
| 1983 | 9 | 0 |
| 1984 | 11 | 0 |
| 1985 | 15 | 0 |
| 1986 | 8 | 0 |
| 1987 | 13 | 0 |
| 1988 | 18 | 0 |
| 1989 | 21 | 0 |
| 1990 | 26 | 0 |
| 1991 | 11 | 0 |
| 1992 | 24 | 0 |
| 1993 | 22 | 0 |
| 1994 | 14 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 9 | 0 |
| 1998 | 29 | 0 |
| 1999 | 35 | 0 |
| 2000 | 34 | 0 |
| 2001 | 36 | 5 |
| 2002 | 30 | 32 |
| 2003 | 33 | 30 |
| 2004 | 20 | 42 |
| 2005 | 20 | 23 |
| 2006 | 19 | 40 |
| 2007 | 18 | 24 |
| 2008 | 20 | 18 |
| 2009 | 13 | 30 |
| 2010 | 21 | 31 |
| 2011 | 21 | 28 |
| 2012 | 23 | 17 |
| 2013 | 30 | 33 |
| 2014 | 21 | 28 |
| 2015 | 25 | 34 |
| 2016 | 20 | 30 |
| 2017 | 30 | 41 |
| 2018 | 26 | 27 |
| 2019 | 31 | 38 |
| 2020 | 38 | 42 |
| 2021 | 39 | 27 |
| 2022 | 24 | 26 |
| 2023 | 25 | 24 |
| 2024 | 21 | 37 |
| 2025 | 30 | 35 |
| 2026 | 17 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Over-current protection device11 Aug 2026US 12,706,234 B2Polytronics Technology Corp.
- Multilayer electronic component11 Aug 2026US 12,706,245 B2KYOCERA Corporation
- Composite thermistor element28 Jul 2026US 12,695,009 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Thermistor layer, electrode for battery, battery, and thermistor28 Jul 2026US 12,695,010 B2Eliiy Power Co., Ltd.
- Thermistor integrated with a bias resistor30 Jun 2026US 12,671,018 B2Texas Instruments Incorporated
- Ptc resistor17 Sep 2026US 2026/0279624 A1Tokyo Cosmos Electric Co., Ltd.
- Ptc thermistor17 Sep 2026US 2026/0279625 A1Tokyo Cosmos Electric Co., Ltd.
- Multilayer electronic component30 Jul 2026US 2026/0221343 A1KYOCERA Corporation
- Positive temperature coefficient polymer composition and circuit protection device16 Jul 2026US 2026/0204459 A1Fuzetec Technology Co., Ltd.
- Circuit protection device2 Jul 2026US 2026/0188999 A1Smart Electronics Inc.
Most cited
By later US patents
- Conductive polymer compositions and devices529US 4,545,926 ARaychem Corporation · 1985
- Low resistivity PTC compositions511US 4,237,441 ARaychem Corporation · 1980
- Electrical devices comprising conductive polymer compositions431US 4,304,987 ARaychem Corporation · 1981
- Conductive polymer composition385US 5,106,538 ARaychem Corporation · 1992
- Conductive polymer compositions381US 4,910,389 ARaychem Corporation · 1990