C21D 1/04
General methods or devices for heat treatment: with simultaneous application of supersonic
Official title: with simultaneous application of supersonic waves, magnetic or electric fields
C21D1/04 (General methods or devices for heat treatment: with simultaneous application of supersonic) appears on 162 US grants and 123 published applications in this corpus.
Search patents in C21D- Granted patents
- 162
- Published applications
- 123
- Assignees
- 99
- Inventors
- 396
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 6 |
| 2004 | 6 | 10 |
| 2005 | 1 | 3 |
| 2006 | 7 | 6 |
| 2007 | 7 | 4 |
| 2008 | 1 | 5 |
| 2009 | 3 | 5 |
| 2010 | 4 | 3 |
| 2011 | 3 | 3 |
| 2012 | 3 | 5 |
| 2013 | 6 | 5 |
| 2014 | 2 | 4 |
| 2015 | 3 | 4 |
| 2016 | 4 | 6 |
| 2017 | 1 | 3 |
| 2018 | 2 | 7 |
| 2019 | 6 | 10 |
| 2020 | 4 | 2 |
| 2021 | 5 | 7 |
| 2022 | 8 | 5 |
| 2023 | 4 | 8 |
| 2024 | 2 | 8 |
| 2025 | 5 | 1 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Magnetically coded device145US 5,631,093 AGeneral Motors Corporation · 1997
- Method for thermomagnetic encoding of permanent magnet materials79US 5,492,572 AGeneral Motors Corporation · 1996
- Fe-base soft magnetic alloy and method of producing same71US 4,881,989 AHitachi Metals, Ltd. · 1989
- Multilayered ferromagnetic film and magnetic head employing the same61US 5,264,981 AInternational Business Machines Corporation · 1993
- Fe-base soft magnetic alloy and method of producing same41US 5,160,379 AHitachi Metals, Ltd. · 1992