B21C 37/157
Perforations
Official title: {Perforations}
B21C37/157 (Perforations) appears on 63 US grants and 54 published applications in this corpus.
Search patents in B21C- Granted patents
- 63
- Published applications
- 54
- Assignees
- 46
- Inventors
- 118
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 3 |
| 2003 | 0 | 1 |
| 2004 | 3 | 3 |
| 2005 | 0 | 0 |
| 2006 | 2 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 6 |
| 2009 | 0 | 9 |
| 2010 | 2 | 3 |
| 2011 | 1 | 4 |
| 2012 | 4 | 2 |
| 2013 | 3 | 4 |
| 2014 | 3 | 1 |
| 2015 | 2 | 1 |
| 2016 | 2 | 3 |
| 2017 | 1 | 1 |
| 2018 | 3 | 1 |
| 2019 | 2 | 0 |
| 2020 | 2 | 6 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Air conduit spirally wound and provided with a plurality of holes, related manufacturing machine and method and related strip3 Jun 2025US 12,318,829 B2
- Stents for prosthetic heart valves and methods of making same23 May 2023US 11,654,022 B2Medtronic, Inc.
- Needle member, sensor, and method for manufacturing needle member14 Mar 2023US 11,602,309 B2Terumo Kabushiki Kaisha
- Compliant b-tube for radiator applications13 Oct 2020US 10,801,781 B2Hanon Systems
- Method for a profiling system, closed profile according to the method, and housing with the closed profile25 Dec 2025US 2025/0391961 A1fischer Edelstahlrohre GmbH
- Air conduit spirally wound and provided with a plurality of holes, related manufacturing machine and method and related strip15 Jul 2021US 2021/0213506 A1Zeffiro Srl
- Stents for prosthetic heart valves and methods of making same10 Dec 2020US 2020/0383778 A1Medtronic, Inc.
- Helically wound tubular structures20 Aug 2020US 2020/0263812 A1Techreo LLC
- Tubular structures13 Aug 2020US 2020/0256485 A1
Most cited
By later US patents
- Stents for prosthetic heart valves and methods of making same45US 8,500,801 B2Medtronic, Inc. · 2013
- Heat exchange tubes43US 5,441,106 ALlanelli Radiators Limited · 1995
- Double-walled structure in a ventilation duct system29US 6,062,270 ALindab AB · 2000
- Double wall helical pipe and strip configuration for forming same27US 4,129,152 APacific Roller Die Co., Inc. · 1978
- Method of making a brazeable metal pipe having tube-insertion apertures formed with guide lugs21US 5,243,842 AShowa Aluminum Corporation · 1993