B23K 20/121
Control circuits therefor
Official title: {Control circuits therefor}
B23K20/121 (Control circuits therefor) appears on 71 US grants and 73 published applications in this corpus.
Search patents in B23K- Granted patents
- 71
- Published applications
- 73
- Assignees
- 65
- Inventors
- 199
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 3 |
| 2003 | 0 | 0 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 4 |
| 2007 | 2 | 3 |
| 2008 | 0 | 2 |
| 2009 | 2 | 3 |
| 2010 | 2 | 4 |
| 2011 | 0 | 2 |
| 2012 | 1 | 4 |
| 2013 | 3 | 1 |
| 2014 | 4 | 1 |
| 2015 | 1 | 3 |
| 2016 | 2 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 6 |
| 2019 | 2 | 6 |
| 2020 | 6 | 6 |
| 2021 | 4 | 6 |
| 2022 | 5 | 4 |
| 2023 | 4 | 2 |
| 2024 | 2 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dissimilar material solid phase bonding method, and dissimilar material solid phase bonded structure15 Sep 2026US 12,734,603 B2The University of Osaka
- Friction stir welding attachment, friction stir welding head, and friction stir welding device10 Jun 2025US 12,325,084 B2Shibaura Machine Co., Ltd.
- Machine tool and control method of machine tool8 Apr 2025US 12,269,111 B2Citizen Watch Co., Ltd.
- Method and apparatus for friction current joining1 Oct 2024US 12,103,102 B2KUKA Deutschland GmbH
- Method for low-temperature joining of metal materials, and joint structure23 Apr 2024US 11,964,338 B2Osaka University
- Friction joining device and friction joining method1 Oct 2026US 2026/0295716 A1Citizen Machinery Co., Ltd.
- Pressure-regulating inertial friction welding system and method11 Jun 2026US 2026/0158583 A1Shandong University
- Automatic Adaptive Control of Friction Stir Welding21 May 2026US 2026/0138206 A1Concurrent Tecnologies Corporation
- Control mechanisms, spindle systems, and spot welding apparatuses23 Apr 2026US 2026/0108976 A1Anhui World Wide Welding Co., Ltd.
- Bonding strength inspection apparatus and bonding system16 Apr 2026US 2026/0102842 A1Samsung SDI.Co., Ltd.
Most cited
By later US patents
- Method and apparatus for in-process sensing of manufacturing quality163US 6,857,553 B1The United States of America as represented by the United States Department of Energy · 2005
- Method and apparatus for controlling downforce during friction stir welding83US 6,050,475 AMcDonnell Douglas Corporation · 2000
- Friction stir conduction controller74US 6,168,066 ALockheed Martin Corporation · 2001
- Force control system54US 6,404,154 B2Emerson Electric Co. · 2002
- Trajectory controller49US 6,091,215 ASwitched Reluctance Drives Limited · 2000