F28F 9/16
By permanent joints
Official title: by permanent joints, e.g. by rolling (metal-working procedures in general B21, B32; particularly B21D39/06, B23K)
F28F9/16 (By permanent joints) appears on 750 US grants and 585 published applications in this corpus.
Search patents in F28F- Granted patents
- 750
- Published applications
- 585
- Assignees
- 403
- Inventors
- 1,746
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 10 | 0 |
| 1980 | 11 | 0 |
| 1981 | 11 | 0 |
| 1982 | 10 | 0 |
| 1983 | 6 | 0 |
| 1984 | 15 | 0 |
| 1985 | 20 | 0 |
| 1986 | 13 | 0 |
| 1987 | 16 | 0 |
| 1988 | 13 | 0 |
| 1989 | 17 | 0 |
| 1990 | 9 | 0 |
| 1991 | 18 | 0 |
| 1992 | 19 | 0 |
| 1993 | 24 | 0 |
| 1994 | 22 | 0 |
| 1995 | 9 | 0 |
| 1996 | 13 | 0 |
| 1997 | 7 | 0 |
| 1998 | 14 | 0 |
| 1999 | 15 | 0 |
| 2000 | 17 | 0 |
| 2001 | 16 | 4 |
| 2002 | 12 | 20 |
| 2003 | 14 | 12 |
| 2004 | 15 | 18 |
| 2005 | 11 | 34 |
| 2006 | 19 | 27 |
| 2007 | 7 | 18 |
| 2008 | 11 | 20 |
| 2009 | 10 | 20 |
| 2010 | 7 | 26 |
| 2011 | 11 | 14 |
| 2012 | 11 | 8 |
| 2013 | 5 | 13 |
| 2014 | 9 | 13 |
| 2015 | 13 | 25 |
| 2016 | 10 | 32 |
| 2017 | 20 | 30 |
| 2018 | 24 | 36 |
| 2019 | 31 | 37 |
| 2020 | 33 | 42 |
| 2021 | 36 | 29 |
| 2022 | 16 | 37 |
| 2023 | 24 | 27 |
| 2024 | 23 | 26 |
| 2025 | 23 | 5 |
| 2026 | 10 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat exchanger and hot water apparatus including heat exchanger8 Sep 2026US 12,729,878 B2Noritz Corporation
- Refrigerator16 Jun 2026US 12,656,046 B2LG Electronics Inc.
- Manifold connection device12 May 2026US 12,624,776 B1Kuen Tong Industrial Co., Ltd
- Tubular membrane heat exchanger12 May 2026US 12,624,897 B2Baltimore Aircoil Company, Inc.
- Pipe connection assembly of heat exchanger5 May 2026US 12,618,621 B2Hanon Systems
- Heat Exchanger That Has A Mechanical Connection Between The Tank And The Base27 Aug 2026US 2026/0251407 A1Mahle International GmbH
- Apparatus, System and Method for Heat Exchanger End Plate Erosion Resistance13 Aug 2026US 2026/0235371 A1Westermeyer Industries Inc.
- Heat exchanger, method for manufacturing the same, and refrigeration apparatus6 Aug 2026US 2026/0227137 A1Daikin Industries, Ltd.
- Heat exchanger and air conditioner comprising same23 Jul 2026US 2026/0210648 A1Samsung Electronics Co., Ltd.
- Heat exchanger having multiple tubes9 Jul 2026US 2026/0194315 A1Arvos GmbH
Most cited
By later US patents
- Self-centering seal for use in hydraulically expanding tubes152US 4,359,889 AHaskel Engineering & Supply Company · 1982
- Force-fitted connection of a circular metal tube in an oval housing96US 4,826,347 ACegedur Societe de Transformation de l'Aluminium Pechiney · 1989
- Method and apparatus for joining a tubular element to a support85US 4,204,312 ASerck Industries Limited · 1980
- Condenser for use in a car cooling system81US 4,825,941 AShowa Aluminum Corporation · 1989
- Method of joining fluted tube joint72US 5,554,244 AReynolds Metals Company · 1996