B23Q 7/1431
Work holder changers
Official title: {Work holder changers (B23Q7/1442 takes precedence)}
B23Q7/1431 (Work holder changers) appears on 207 US grants and 132 published applications in this corpus.
Search patents in B23Q- Granted patents
- 207
- Published applications
- 132
- Assignees
- 128
- Inventors
- 440
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 6 |
| 2002 | 2 | 5 |
| 2003 | 4 | 2 |
| 2004 | 4 | 6 |
| 2005 | 3 | 1 |
| 2006 | 2 | 9 |
| 2007 | 5 | 4 |
| 2008 | 3 | 2 |
| 2009 | 2 | 7 |
| 2010 | 3 | 6 |
| 2011 | 1 | 4 |
| 2012 | 3 | 5 |
| 2013 | 4 | 3 |
| 2014 | 7 | 8 |
| 2015 | 6 | 8 |
| 2016 | 3 | 4 |
| 2017 | 9 | 4 |
| 2018 | 3 | 4 |
| 2019 | 4 | 4 |
| 2020 | 5 | 3 |
| 2021 | 1 | 2 |
| 2022 | 3 | 15 |
| 2023 | 1 | 5 |
| 2024 | 6 | 7 |
| 2025 | 11 | 2 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Machining center7 Apr 2026US 12,594,636 B2Kitamura Machinery Co., Ltd.
- Handling system and handling device for handling workpiece pallets17 Feb 2026US 12,551,977 B2Deckel Maho Pfronten GmbH
- Changeover apparatus for changing between at least two workpiece supports for a machining machine23 Dec 2025US 12,502,744 B2TRUMPF Werkzeugmaschinen GmbH + Co. KG
- Pallet supply apparatus23 Sep 2025US 12,420,369 B2Dmg Mori Co., Ltd.
- Substrate production system24 Jun 2025US 12,337,434 B2Fuji Corporation
- Article transport system and article transport method6 Aug 2026US 2026/0227774 A1Amada Company, Limited
- Method for operating a mechanical production plant, and mechanical production plant4 Jun 2026US 2026/0151867 A1
- Workpiece loading and unloading device and control method for workpiece loading and unloading device4 Jun 2026US 2026/0152355 A1Citizen Machinery Co., Ltd.
- Modular Two-Operation Automation System for CNC Machining Utilizing Integrated Pneumatic Vises and Automated Part-Flipping Station28 May 2026US 2026/0145283 A1
- Internal pallet loader for cnc machine28 May 2026US 2026/0145286 A1
Most cited
By later US patents
- Method and apparatus for handling workpieces137US 3,968,885 AInternational Business Machines Corporation · 1976
- System for automatic finishing of machine parts124US 5,091,861 AN.C.T. Limited · 1992
- Device for pushing and pulling an accessory instrument of manufacturing plant71US 4,830,337 AAioi Seiki Kabushiki Kaisha · 1989
- Pallet transfer system43US 4,373,840 AGiddings & Lewis, Inc. · 1983
- Workpiece storage and shuttle apparatus42US 4,480,738 AKearney & Trecker Corporation · 1984