B21C 37/128
Control or regulating devices
Official title: {Control or regulating devices}
B21C37/128 (Control or regulating devices) appears on 35 US grants and 21 published applications in this corpus.
Search patents in B21C- Granted patents
- 35
- Published applications
- 21
- Assignees
- 21
- Inventors
- 61
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 2 | 2 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 2 | 3 |
| 2020 | 0 | 2 |
| 2021 | 1 | 2 |
| 2022 | 2 | 3 |
| 2023 | 2 | 0 |
| 2024 | 1 | 1 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spiral forming19 May 2026US 12,629,738 B2Keystone Tower Systems, Inc.
- Air conduit spirally wound and provided with a plurality of holes, related manufacturing machine and method and related strip3 Jun 2025US 12,318,829 B2
- Tubular structure reinforcing13 May 2025US 12,297,951 B2Keystone Tower Systems, Inc.
- Control system and method for tapered structure construction25 Mar 2025US 12,257,616 B2Keystone Tower Systems, Inc.
- Elbow-shaped duct manufacturing apparatus7 May 2024US 11,975,373 B2
- Spiral forming14 Mar 2024US 2024/0082899 A1Keystone Tower Systems, Inc.
- Control system and method for tapered structure construction22 Sep 2022US 2022/0297175 A1Keystone Tower Systems, Inc.
- Elbow-Shaped Duct Manufacturing Apparatus16 Jun 2022US 2022/0184681 A1
- Spiral forming17 Mar 2022US 2022/0080484 A1Keystone Tower Systems, Inc.
- Tubular structure reinforcing29 Jul 2021US 2021/0231237 A1Keystone Tower Systems, Inc.
Most cited
By later US patents
- Conduit making machine with diameter control and method22US 3,940,962 APacific Roller Die Co., Inc. · 1976
- Apparatus for forming tapered spiral tubes22US 6,339,945 B22002
- Separator arrangement for start-up system16US 3,992,172 AFoster Wheeler Energy Corporation · 1976
- Means for fabricating tapered tubing15US 3,997,097 A1976
- Method for producing welded helical-seam tubes having optimized tube geometry13US 8,941,023 B2Salzgitter Mannesmann Grossrohr GmbH · 2015