F28F 1/32
The means having portions engaging further tubular elements
Official title: the means having portions engaging further tubular elements
F28F1/32 (The means having portions engaging further tubular elements) appears on 1,049 US grants and 1,353 published applications in this corpus.
Search patents in F28F- Granted patents
- 1,049
- Published applications
- 1,353
- Assignees
- 514
- Inventors
- 2,679
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 7 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 14 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 13 | 0 |
| 1988 | 13 | 0 |
| 1989 | 13 | 0 |
| 1990 | 9 | 0 |
| 1991 | 15 | 0 |
| 1992 | 11 | 0 |
| 1993 | 13 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 15 | 0 |
| 1997 | 15 | 0 |
| 1998 | 23 | 0 |
| 1999 | 20 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 4 |
| 2002 | 16 | 12 |
| 2003 | 13 | 25 |
| 2004 | 21 | 30 |
| 2005 | 23 | 56 |
| 2006 | 37 | 37 |
| 2007 | 23 | 45 |
| 2008 | 16 | 49 |
| 2009 | 17 | 49 |
| 2010 | 17 | 66 |
| 2011 | 19 | 63 |
| 2012 | 18 | 47 |
| 2013 | 20 | 70 |
| 2014 | 18 | 61 |
| 2015 | 30 | 61 |
| 2016 | 36 | 47 |
| 2017 | 42 | 62 |
| 2018 | 54 | 69 |
| 2019 | 60 | 70 |
| 2020 | 53 | 83 |
| 2021 | 46 | 53 |
| 2022 | 57 | 60 |
| 2023 | 41 | 54 |
| 2024 | 39 | 64 |
| 2025 | 42 | 75 |
| 2026 | 28 | 41 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat exchanger6 Oct 2026US 12,753,977 B2Kyungdong Navien Co., Ltd.
- Heat exchanger, refrigeration cycle apparatus, and method for manufacturing heat exchanger8 Sep 2026US 12,729,920 B2Mitsubishi Electric Corporation
- Water tank assembly for heating device, and heating device25 Aug 2026US 12,716,614 B2Wuhu Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- Composite coating film, heat exchanger comprising same, and method for manufacturing heat exchanger25 Aug 2026US 12,716,662 B2LG Electronics Inc.
- Heat exchanger18 Aug 2026US 12,710,233 B2LG Electronics Inc.
- Heat exchanger8 Oct 2026US 2026/0309428 A1Hanon Systems
- Heat exchanger24 Sep 2026US 2026/0287275 A1Daikin Industries, Ltd.
- Heat exchanger and air conditioner employing the same10 Sep 2026US 2026/0266565 A1Samsung Electronics Co., Ltd.
- Fin, heat exchanger and water heater3 Sep 2026US 2026/0259013 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- Fin, heat exchanger and water heater3 Sep 2026US 2026/0259015 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
Most cited
By later US patents
- Heat management system167US 6,351,381 B1Thermal Corp. · 2002
- Heat exchanger141US 6,964,296 B2Modine Manufacturing Company · 2005
- Turbine engine with intercooler in bypass air passage118US 6,134,880 AConcepts ETI, Inc. · 2000
- Electronic unit96US 5,842,514 ANorthern Telecom Limited · 1998
- Heat and mass exchanger94US 7,269,966 B2AIL Reasearch, Inc. · 2007