B21C 37/104
The tubes having a special shape
Official title: {the tubes having a special shape, e.g. polygonal tubes}
B21C37/104 (The tubes having a special shape) appears on 34 US grants and 21 published applications in this corpus.
Search patents in B21C- Granted patents
- 34
- Published applications
- 21
- Assignees
- 21
- Inventors
- 55
- Latest grant
- 4 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 2 |
| 2005 | 3 | 0 |
| 2006 | 1 | 5 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 4 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Seam forming apparatus for elbow duct4 Feb 2025US 12,214,396 B2
- Metal plate and method of producing tubular body28 Jun 2022US 11,370,009 B2Canon Kabushiki Kaisha
- Sealant system for metal seams7 Sep 2021US 11,110,501 B2Mestek Machinery, Inc.
- Sealant system for metal seams29 Sep 2020US 10,786,841 B2Mestek Machinery, Inc.
- Sealant system for metal seams24 Sep 2019US 10,421,108 B2Mestek Machinery, Inc.
- In-situ solar tracker manufacturing22 May 2025US 2025/0164154 A1
- Thermally broken structural tube1 May 2025US 2025/0135519 A1
- Seam forming apparatus for elbow duct10 Aug 2023US 2023/0249238 A1
- Metal plate and method of producing tubular body26 Mar 2020US 2020/0094302 A1Canon Kabushiki Kaisha
- Sealant system for metal seams29 Aug 2019US 2019/0262881 A1Mestek Machinery, Inc.
Most cited
By later US patents
- Structure of lightweight bars and connector means therefore105US 4,069,638 AScanovator AB · 1978
- Apparatus and method for manufacturing ducts19US 6,378,184 B1Cleveland Tool & Machine, Inc. · 2002
- Fabric covered metal rail and method for producing same17US 5,049,424 AHunter Douglas Inc. · 1991
- Sheet metal casing for a small electric motor17US 5,426,337 AJidosha Denki Kogyo Kabushiki Kaisha · 1995
- Method of manufacturing pipe body and pipe body manufactured by the method16US 6,601,427 B2Ricoh Company, Ltd. · 2003