B21H 3/02
External screw-threads
Official title: external screw-threads {; Making dies for thread rolling}
B21H3/02 (External screw-threads) appears on 375 US grants and 252 published applications in this corpus.
Search patents in B21H- Granted patents
- 375
- Published applications
- 252
- Assignees
- 240
- Inventors
- 594
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 11 | 0 |
| 1987 | 11 | 0 |
| 1988 | 18 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 2 |
| 2002 | 6 | 9 |
| 2003 | 6 | 5 |
| 2004 | 6 | 9 |
| 2005 | 5 | 10 |
| 2006 | 8 | 13 |
| 2007 | 7 | 7 |
| 2008 | 4 | 3 |
| 2009 | 2 | 6 |
| 2010 | 4 | 6 |
| 2011 | 1 | 16 |
| 2012 | 5 | 10 |
| 2013 | 5 | 13 |
| 2014 | 6 | 14 |
| 2015 | 10 | 11 |
| 2016 | 9 | 17 |
| 2017 | 16 | 8 |
| 2018 | 14 | 20 |
| 2019 | 13 | 14 |
| 2020 | 11 | 11 |
| 2021 | 11 | 9 |
| 2022 | 8 | 13 |
| 2023 | 6 | 8 |
| 2024 | 10 | 7 |
| 2025 | 6 | 6 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tool unit for a cold forming machine6 Jan 2026US 12,515,250 B2Osg Ex-Cell-O GmbH
- Rolled thread screw and rolled thread screw manufacturing method30 Dec 2025US 12,510,111 B2Nsk Ltd.
- Method for manufacturing a die-casting machine and die-casting machine25 Nov 2025US 12,479,023 B2Italpressegauss S.P.A.
- Manufacturing method of ball screw using rolling machine28 Oct 2025US 12,454,000 B2Hitachi Astemo, Ltd.
- Aluminum impact extruded bottle with threaded neck made from recycled aluminum and enhanced alloys17 Jun 2025US 12,330,201 B2Ball Corporation
- System and method for manufacturing reduced thread height point fasteners17 Sep 2026US 2026/0273612 A1Research Engineering & Manufacturing, Inc.
- Balance compensated screw thread and method for making the same13 Aug 2026US 2026/0232362 A1
- End-profiling machine, method for end-profiling a thread, and fastening means2 Jul 2026US 2026/0183831 A1KAMAX Holding GmbH & Co. KG
- Male thread repair tool21 May 2026US 2026/0138176 A1
- Material for aluminum alloy screw, and aluminum alloy screw and production method therefor7 May 2026US 2026/0126075 A1Nippon Light Metal Company, Ltd.
Most cited
By later US patents
- Method and apparatus for the manufacture of threaded aluminum containers99US 5,293,765 AE. Nussbaum AG · 1994
- Wood screw and method for making same94US 4,815,909 A1989
- Threaded fastener91US 5,544,993 A1996
- Threaded load transferring attachment86US 6,425,829 B1Nitinol Technologies, Inc. · 2002
- Die for, method of making, and fastener with lobed primary thread lead and interposed dual auxiliary thread lead with improved substrate entry end portion70US 7,156,600 B2Illinois Tool Works Inc. · 2007