F25B 2309/1404
Pulse-tube cycles with loudspeaker driven acoustic driver
F25B2309/1404 (Pulse-tube cycles with loudspeaker driven acoustic driver) appears on 27 US grants and 19 published applications in this corpus.
Search patents in F25B- Granted patents
- 27
- Published applications
- 19
- Assignees
- 20
- Inventors
- 39
- Latest grant
- 26 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 3 |
| 2004 | 3 | 1 |
| 2005 | 1 | 2 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 3 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cryocooler with concentric moving mechanisms26 Oct 2021US 11,156,390 B2Raytheon Company
- Thermoacoustic energy converting element part and thermoacoustic energy converter19 Nov 2019US 10,480,832 B2NGK Insulators, Ltd.
- Thermo-acoustic heat pump6 Aug 2019US 10,371,418 B2Stichting Energieonderzoek Centrum Nederland
- Thermoacoustic heating device26 Mar 2019US 10,240,822 B2Isuzu Motors Limited
- Hybrid power system12 Dec 2017US 9,841,009 B2Northrop Grumman Systems Corporation
- Cryogenic cooling system with a resonant expander2 Apr 2026US 2026/0092725 A1R7 Instruments, Inc.
- Acoustic power modulation in a thermoacoustic machine6 Mar 2025US 2025/0075948 A1Equium Groupe
- Cryocooler with concentric moving mechanisms3 Jan 2019US 2019/0003745 A1Raytheon Company
- Thermo-acoustic heat pump20 Sep 2018US 2018/0266733 A1Stichting Energieonderzoek Centrum Nederland
- Hybrid power system2 Feb 2017US 2017/0030339 A1Northrop Grumman Systems Corporation
Most cited
By later US patents
- Intrinsically irreversible heat engine59US 4,489,553 AThe United States of America as represented by the United States Department of Energy · 1984
- Acoustical heat pumping engine55US 4,398,398 A1983
- High-power thermoacoustic refrigerator45US 5,647,216 AThe United States of America as represented by the Secretary of the Navy · 1997
- Acoustic cooling engine44US 4,722,201 AThe United States of America as represented by the United States Department of Energy · 1988
- Automatic ice maker using thermoacoustic refrigeration and refrigerator having the same37US 6,145,320 ADaewoo Electronics Co., Ltd. · 2000