B21H 3/027
Rolling of self-tapping screws
Official title: {Rolling of self-tapping screws}
B21H3/027 (Rolling of self-tapping screws) appears on 65 US grants and 27 published applications in this corpus.
Search patents in B21H- Granted patents
- 65
- Published applications
- 27
- Assignees
- 43
- Inventors
- 86
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 3 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 2 | 3 |
| 2006 | 3 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 4 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 2 |
| 2022 | 0 | 2 |
| 2023 | 2 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Self-drilling screw structure and manufacturing method thereof15 Apr 2025US 12,276,296 B2Bi-Mirth Corp.
- Method for integrally forming a stop flange on a self-tapping screw by threading dies29 Aug 2023US 11,739,784 B2
- Method for manufacturing a multi-functional fastener14 Feb 2023US 11,577,301 B2Essence Method Refine Co., Ltd.
- Metric self-tapping locking screw and the manufacturing method thereof20 Aug 2019US 10,385,903 B2Essence Fastening System (Shanghai) Co., Ltd.
- Self-tapping screw and method of manufacturing the same27 Mar 2018US 9,926,962 B2Crown Screw Corporation
- Screw anchors and manufacturing methods5 Dec 2024US 2024/0401629 A1
- Self-drilling screw structure and manufacturing method thereof21 Mar 2024US 2024/0093712 A1Bi-Mirth Corp.
- Manufacturing method of a drill29 Dec 2022US 2022/0410253 A1Hilti Aktiengesellschaft
- Method for manufacturing a multi-functional fastener28 Apr 2022US 2022/0126356 A1Essence Method Refine Co., Ltd.
- Connecting Element25 Mar 2021US 2021/0086254 A1EJOT GmbH & Co. KG
Most cited
By later US patents
- Wood screw and method for making same94US 4,815,909 A1989
- 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
- Thread rolling screw52US 5,088,869 A1992
- Thread-forming fastener having dual lobulation and dies for making the same41US 4,040,328 AResearch Engineering & Manufacturing, Inc. · 1977
- Threaded fastener38US 4,637,767 ATopura Co., Ltd. · 1987