B21C 37/29
Making branched pieces
Official title: Making branched pieces, e.g. T-pieces
B21C37/29 (Making branched pieces) appears on 161 US grants and 60 published applications in this corpus.
Search patents in B21C- Granted patents
- 161
- Published applications
- 60
- Assignees
- 122
- Inventors
- 327
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 7 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 12 | 0 |
| 2001 | 7 | 3 |
| 2002 | 7 | 6 |
| 2003 | 7 | 3 |
| 2004 | 3 | 4 |
| 2005 | 7 | 8 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 4 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 2 | 1 |
| 2012 | 2 | 3 |
| 2013 | 1 | 3 |
| 2014 | 1 | 2 |
| 2015 | 0 | 3 |
| 2016 | 1 | 2 |
| 2017 | 3 | 0 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 2 | 3 |
| 2023 | 1 | 2 |
| 2024 | 0 | 3 |
| 2025 | 5 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and device for perforating a pipe wall25 Aug 2026US 12,715,029 B2T-Drill Oy
- Stainless steel spray boom for aerial spraying16 Sep 2025US 12,415,192 B2Texas Transland LLC
- Tee type connector pipe manufacturing method5 Aug 2025US 12,377,456 B2
- Apparatus for producing branch structure in metal pipe, and method for producing branch structure in metal pipe3 Jun 2025US 12,318,833 B2Araki Technical and Research Co., Ltd
- Device and method for making efficient Y-pipes20 May 2025US 12,303,962 B2ROLLS-ROYCE plc
- Friction drilled spray header16 Apr 2026US 2026/0102780 A1
- Stainless Steel Spray Boom for Aerial Spraying1 Jan 2026US 2026/0001089 A1Texas Transland LLC
- Workpiece processing method, machine tool, and non-transitory computer-readable recording medium25 Sep 2025US 2025/0296176 A1Yamazaki Mazak Corporation
- Method and device for making a t-branch for pipes25 Sep 2025US 2025/0297701 A1T-Drill Oy
- Tee type connector pipe manufacturing method10 Oct 2024US 2024/0335869 A1
Most cited
By later US patents
- Compressible fitting and associated method52US 5,090,743 AMannesmann Aktiengesellschaft · 1992
- Framework with hollow members process for producing the same and its use47US 5,794,398 A1998
- Method for manufacturing a pipe with projections34US 4,840,053 AKokan Kako Co., Ltd. · 1989
- Frame forming member32US 5,829,219 AHonda Giken Kogyo Kabushiki Kaisha · 1998
- Method for manufacturing a pipe with projections31US 4,928,509 AKokan Kako Co., Ltd. · 1990