B21D 39/063
For assembling ladders
Official title: {for assembling ladders}
B21D39/063 (For assembling ladders) appears on 13 US grants and 2 published applications in this corpus.
Search patents in B21D- Granted patents
- 13
- Published applications
- 2
- Assignees
- 10
- Inventors
- 14
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 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 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Vehicle structural member and method for manufacturing same15 Apr 2025US 12,275,457 B2Kobe Steel, Ltd.
- Ladder with anti-deformed side rails7 Mar 2000US 6,032,759 ADofair Co., Ltd.
- Hollow section for coupling with other sections27 Oct 1992US 5,158,389 AVAW Aluminium AG
- Process for formation of high strength aluminum ladder structures30 Aug 1988US 4,766,664 AAlumax Extrusions, Inc.
- Method of applying hollow section coupling to other sections13 Oct 1987US 4,698,896 AVaw Leichtmetall GmbH
Most cited
By later US patents
- Device for connecting a tube and a sheet metal element39US 4,597,687 A1986
- Apparatus and methods for making rail-to-rung joints for ladders and joints for other structural elements33US 4,656,721 AR. D. Werner Co., Inc. · 1987
- Method of applying hollow section coupling to other sections31US 4,698,896 AVaw Leichtmetall GmbH · 1987
- Coupling of a tube to a ring member29US 4,389,134 ACegedur Societe de Transformation de l'Aluminium Pechiney · 1983
- Process for formation of high strength aluminum ladder structures23US 4,766,664 AAlumax Extrusions, Inc. · 1988