H05B 2203/02
Heaters using heating elements having a positive temperature coefficient
H05B2203/02 (Heaters using heating elements having a positive temperature coefficient) appears on 557 US grants and 823 published applications in this corpus.
Search patents in H05B- Granted patents
- 557
- Published applications
- 823
- Assignees
- 353
- Inventors
- 1,447
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 4 |
| 2002 | 19 | 7 |
| 2003 | 5 | 13 |
| 2004 | 6 | 7 |
| 2005 | 6 | 14 |
| 2006 | 10 | 15 |
| 2007 | 12 | 16 |
| 2008 | 7 | 11 |
| 2009 | 2 | 14 |
| 2010 | 7 | 12 |
| 2011 | 5 | 16 |
| 2012 | 7 | 16 |
| 2013 | 16 | 26 |
| 2014 | 9 | 29 |
| 2015 | 16 | 33 |
| 2016 | 31 | 38 |
| 2017 | 22 | 47 |
| 2018 | 22 | 45 |
| 2019 | 36 | 60 |
| 2020 | 27 | 79 |
| 2021 | 38 | 83 |
| 2022 | 43 | 51 |
| 2023 | 37 | 64 |
| 2024 | 39 | 58 |
| 2025 | 47 | 39 |
| 2026 | 17 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ceramic body, honeycomb structure, method for producing ceramic body and heater element29 Sep 2026US 12,750,923 B2NGK Insulators, Ltd.
- Work vehicle25 Aug 2026US 12,713,997 B2Yanmar Holdings Co., Ltd.
- Electric heating device25 Aug 2026US 12,720,644 B2Eberspacher catem GmbH & Co.KG
- Aerogel blanket insulator and its functional composite28 Jul 2026US 12,696,357 B2Ndt Engineering & Aerospace Co., Ltd.
- Heating system16 Jun 2026US 12,658,040 B2Tramec, L.L.C.
- Ptc resistor17 Sep 2026US 2026/0279624 A1Tokyo Cosmos Electric Co., Ltd.
- Heater and image heating device mounted with heater10 Sep 2026US 2026/0267261 A1Canon Kabushiki Kaisha
- Self regulating heater in an intermediate bulk container3 Sep 2026US 2026/0257855 A1Caliente LLC
- Overheat protection of aircraft cabin window anti-fogging/frosting measures27 Aug 2026US 2026/0249998 A1Bombardier Inc.
- Heater rod20 Aug 2026US 2026/0247498 A1
Most cited
By later US patents
- Polymer compositions exhibiting a PTC property and methods of fabrication755US 7,309,849 B2SurgRx, Inc. · 2007
- Self-regulating heater employing reactive components419US 4,849,611 ARaychem Corporation · 1989
- Polymer thick film heating element on a glass substrate176US 6,512,203 B2Polymore Circuit Technologies · 2003
- Apparatus and method for heating microfluidic volumes and moving fluids160US 7,049,558 B2Arcturas Bioscience, Inc. · 2006
- Multi-conductor soft heating element139US 6,452,138 B1Thermosoft International Corporation · 2002