C21D 1/42
Induction heating
C21D1/42 (Induction heating) appears on 573 US grants and 742 published applications in this corpus.
Search patents in C21D- Granted patents
- 573
- Published applications
- 742
- Assignees
- 354
- Inventors
- 1,642
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 7 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 3 |
| 2003 | 2 | 6 |
| 2004 | 6 | 14 |
| 2005 | 9 | 12 |
| 2006 | 4 | 15 |
| 2007 | 7 | 12 |
| 2008 | 6 | 16 |
| 2009 | 10 | 25 |
| 2010 | 7 | 28 |
| 2011 | 5 | 22 |
| 2012 | 11 | 36 |
| 2013 | 15 | 23 |
| 2014 | 19 | 36 |
| 2015 | 23 | 54 |
| 2016 | 27 | 60 |
| 2017 | 27 | 62 |
| 2018 | 41 | 46 |
| 2019 | 54 | 59 |
| 2020 | 53 | 34 |
| 2021 | 33 | 34 |
| 2022 | 37 | 39 |
| 2023 | 30 | 32 |
| 2024 | 18 | 29 |
| 2025 | 25 | 24 |
| 2026 | 14 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Housing of an induction hardening tool6 Oct 2026US 12,752,288 B2Aktiebolaget Skf
- Spatially selective electromagnetic field assisted processing of bulk crystalline soft magnetic alloys18 Aug 2026US 12,709,780 B2University of Pittsburgh—Of the Commonwealth System of Higher Education
- Dual-frequency power-supply apparatus, high-frequency heating apparatus, and high-frequency quenching apparatus11 Aug 2026US 12,706,545 B2Neturen Co., Ltd.
- Energy-efficient production of a ferritic hot-rolled strip in an integrated casting-rolling plant14 Jul 2026US 12,680,144 B2Primetals Technologies Austria GmbH
- Nanocrystalline soft magnetic alloy with high magnetic induction and high frequency and preparation method thereof2 Jun 2026US 12,646,642 B2Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
- Integrated welding and thermal processing joining method for creep strength enhanced ferritic steels3 Sep 2026US 2026/0257302 A1Kva Technologies
- Method and system for temperature controlled pre-spinning of rotor forgings3 Sep 2026US 2026/0262140 A1Schenck USA Corp.
- Magnetically enhanced induction heat treating application27 Aug 2026US 2026/0250796 A1Ajax Tocco Magnethermic Corporation
- Electric resistance welded steel pipes and line pipes30 Jul 2026US 2026/0218351 A1Jfe Steel Corporation
- Continuous annealing line, continuous annealing method, method of producing cold-rolled steel sheet, and method of producing coated or plated steel sheet30 Jul 2026US 2026/0218361 A1Jfe Steel Corporation
Most cited
By later US patents
- Method and system for selectively softening hot stamped parts by induction heating94US 10,308,992 B2Ford Motor Company · 2019
- Induction heating system with a flexible coil56US 6,229,126 B1Illinois Tool Works Inc. · 2001
- Inductive preheating of upset tubing50US 4,447,690 ASelas Corporation of America · 1984
- Induction heating device with electronic positioning control34US 4,542,272 AThe Cross Company · 1985
- Apparatus for scaleless induction heating34US 5,414,246 AFord Motor Company · 1995