B21K 1/52
Double-ended
Official title: double-ended, e.g. with heads on both ends (forming heads B21K1/46)
B21K1/52 (Double-ended) appears on 5 US grants and 3 published applications in this corpus.
Search patents in B21K- Granted patents
- 5
- Published applications
- 3
- Assignees
- 3
- Inventors
- 6
- Latest grant
- 21 Nov 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Extrusion molding method and molding apparatus for manufacturing self-clinching rivet21 Nov 2023US 11,819,908 B2Penn Engineering & Manufacturing Corp.
- Methods and apparatus for forming a workpiece24 Apr 2007US 7,207,203 B2General Electric Company
- Method of manufacturing of fastening elements22 May 2001US 6,234,913 B1Hilti Akteingesellschaft
- Extruded metal chain pin3 Jan 1995US 5,378,205 A
- Method and apparatus for simultaneously upsetting the ends of a cylindricl blank22 Nov 1994US 5,365,765 A
- Extrusion Molding Method and Molding Apparatus for Manufacturing Self-Clinching Rivet3 Dec 2020US 2020/0376539 A1Penn Engineering & Manufacturing Corp.
- Conveyor chain pin forming facility27 Oct 2005US 2005/0235723 A1
- Methods and apparatus for forming a workpiece27 Oct 2005US 2005/0235724 A1General Electric Company
Most cited
By later US patents
- Method and apparatus for simultaneously upsetting the ends of a cylindricl blank11US 5,365,765 A1994
- Extruded metal chain pin10US 5,378,205 A1995
- Method of manufacturing of fastening elements5US 6,234,913 B1Hilti Akteingesellschaft · 2001
- Methods and apparatus for forming a workpiece3US 7,207,203 B2General Electric Company · 2007