F25D 21/004
Control mechanisms
Official title: {Control mechanisms (F25D21/006 takes precedence)}
F25D21/004 (Control mechanisms) appears on 59 US grants and 76 published applications in this corpus.
Search patents in F25D- Granted patents
- 59
- Published applications
- 76
- Assignees
- 42
- Inventors
- 156
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 7 |
| 2015 | 1 | 12 |
| 2016 | 4 | 3 |
| 2017 | 4 | 4 |
| 2018 | 9 | 10 |
| 2019 | 6 | 7 |
| 2020 | 5 | 7 |
| 2021 | 10 | 3 |
| 2022 | 5 | 1 |
| 2023 | 4 | 5 |
| 2024 | 1 | 6 |
| 2025 | 4 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Defrost system for a conditioned space19 May 2026US 12,631,390 B1Tippmann Engineering, LLC
- Refrigerator cooling system and method for defrosting refrigerator24 Feb 2026US 12,560,372 B2Hefei Hualing Co., Ltd.
- Refrigerator20 Jan 2026US 12,529,505 B2LG Electronics Inc.
- Manual defrost mechanism30 Dec 2025US 12,510,290 B2Robertshaw Controls Private Limited
- Refrigeration system and method of defrosting the same2 Dec 2025US 12,487,023 B2Heatcraft Refrigeration Products LLC
- Household refrigeration appliance apparatus, no-frost apparatus, household refrigeration appliance, and method for operating a household refrigeration appliance26 Mar 2026US 2026/0085871 A1BSH Hausgeräte GmbH
- Refrigeration system and method of defrosting the same26 Feb 2026US 2026/0055950 A1Heatcraft Refrigeration Products LLC
- Refrigerator and control method thereof15 Jan 2026US 2026/0016215 A1Samsung Electronics Co., Ltd.
- Refrigerator and control method of refrigerator30 Oct 2025US 2025/0334318 A1Samsung Electronics Co., Ltd.
- Electronic device, method, and computer readable storage medium for managing defrosting period of refrigerator30 Jan 2025US 2025/0035364 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Control unit for refrigerators or freezers6US 4,510,765 ARanco Incorporated · 1985
- Defrost on demand thermostat5US 6,525,641 B1General Electric Company · 2003
- Air conditioner for vehicle5US 9,494,360 B2Honda Motor Co., Ltd. · 2016
- Air conditioner for vehicle with heat pump cycle4US 9,250,005 B2Denso Corporation · 2016
- Heat pump controller with user-selectable defrost modes and reversing valve energizing modes4US 9,964,345 B2Emerson Electric Co. · 2018