F25D 21/006
With electronic control circuits
Official title: {with electronic control circuits}
F25D21/006 (With electronic control circuits) appears on 310 US grants and 291 published applications in this corpus.
Search patents in F25D- Granted patents
- 310
- Published applications
- 291
- Assignees
- 154
- Inventors
- 779
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 3 |
| 2002 | 5 | 5 |
| 2003 | 7 | 3 |
| 2004 | 9 | 3 |
| 2005 | 3 | 5 |
| 2006 | 2 | 6 |
| 2007 | 2 | 8 |
| 2008 | 0 | 3 |
| 2009 | 1 | 5 |
| 2010 | 3 | 6 |
| 2011 | 5 | 9 |
| 2012 | 3 | 12 |
| 2013 | 3 | 13 |
| 2014 | 4 | 11 |
| 2015 | 8 | 18 |
| 2016 | 7 | 11 |
| 2017 | 13 | 9 |
| 2018 | 11 | 22 |
| 2019 | 18 | 25 |
| 2020 | 16 | 23 |
| 2021 | 25 | 17 |
| 2022 | 15 | 14 |
| 2023 | 11 | 18 |
| 2024 | 14 | 14 |
| 2025 | 16 | 17 |
| 2026 | 12 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Accessible cooling environment9 Jun 2026US 12,650,256 B2Kps Global LLC
- Refrigerator2 Jun 2026US 12,644,637 B2LG Electronics Inc.
- Refrigerator appliance with condensation mitigation features2 Jun 2026US 12,644,640 B2Haier US Appliance Solutions, Inc.
- Method of operating a refrigerator appliance1 Oct 2026US 2026/0298521 A1Haier US Appliance Solutions, Inc.
- Method for defrosting a primary evaporator and an auxiliary evaporator of a refrigerator appliance3 Sep 2026US 2026/0258996 A1
- Refrigerator and server device capable of diagnosing state and methods thereof6 Aug 2026US 2026/0227119 A1Samsung Electronics Co., Ltd.
- Method and apparatus for determining freezer status25 Jun 2026US 2026/0177309 A1Elemental Machines, Inc.
- Control method for preventing high temperatures of electrical heating devices of commercial refrigerator7 May 2026US 2026/0126235 A1DEI TeK CO., LTD.
Most cited
By later US patents
- Self-calibrating control methods and systems for refrigeration systems109US 4,653,285 AGeneral Electric Company · 1987
- Demand defrost control method and apparatus98US 4,882,908 ARanco Incorporated · 1989
- Blocked fan detection system for heat pump96US 5,440,890 ACopeland Corporation · 1995
- Defrosting system using actual defrosting time as a controlling parameter93US 4,251,988 AAMF Incorporated · 1981
- Blocked fan detection system for heat pump92US 5,528,908 ACopeland Corporation · 1996