B21J 9/12
Operated by hydraulic or liquid pressure
Official title: operated by hydraulic or liquid pressure
B21J9/12 (Operated by hydraulic or liquid pressure) appears on 65 US grants and 41 published applications in this corpus.
Search patents in B21J- Granted patents
- 65
- Published applications
- 41
- Assignees
- 48
- Inventors
- 146
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 3 |
| 2016 | 2 | 1 |
| 2017 | 0 | 2 |
| 2018 | 3 | 6 |
| 2019 | 1 | 1 |
| 2020 | 6 | 3 |
| 2021 | 4 | 6 |
| 2022 | 2 | 0 |
| 2023 | 1 | 4 |
| 2024 | 3 | 4 |
| 2025 | 3 | 1 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Forging press for hot forging of asymmetric to symmetric rail and process of forging thereof26 May 2026US RE50,897 E1Savita Nowar
- Hydraulic forming machine for pressing workpieces, in particular forging hammer, and method for operating a hydraulic forming machine, in particular a forging hammer14 Apr 2026US 12,599,954 B2Langenstein & Schemann GmbH
- Lightweight two-crossbeam high-speed free forging hydraulic press27 Jan 2026US 12,533,725 B2Xi' An Jiaotong University
- Workpiece processing apparatus6 Jan 2026US 12,515,251 B2Japan Aviation Electronics Industry, Limited
- Material forming20 May 2025US 12,303,968 B2Cell Impact AB
- Hydraulic Forming Machine for Workpiece Forming, Hydraulic Control Unit and Method for Controlling a Hydraulic Cylinder of a Hydraulic Forming Machine6 Mar 2025US 2025/0073774 A1
- Material forming8 Aug 2024US 2024/0261848 A1Cell Impact AB
- Lightweight two-crossbeam high-speed free forging hydraulic press4 Jul 2024US 2024/0216984 A1Xi' An Jiaotong University
- Hot forming a cast forging ingot27 Jun 2024US 2024/0207922 A1GFM GmbH
- Hydraulic forming machine for pressing workpieces, in particular forging hammer, and method for operating a hydraulic forming machine, in particular a forging hammer30 May 2024US 2024/0173765 A1Langenstein & Schemann GmbH
Most cited
By later US patents
- Portable battery powered crimper73US 5,727,417 AGreenlee Textron Inc. · 1998
- Hydraulic machine26US 6,240,758 B1Toyokoki Co., Ltd. · 2001
- Closed forging press17US 4,321,818 AKawaski Yukon Kabushiki Kaisha · 1982
- Apparatus for the plastic working of material16US 3,938,362 AAB Metalform · 1976
- Forging press14US 4,148,209 AKawasaki Yukoh Kabushiki Kaisha · 1979