F01B 29/00
Machines or engines with pertinent characteristics other than those provided for in
Official title: Machines or engines with pertinent characteristics other than those provided for in preceding main groups
F01B29/00 (Machines or engines with pertinent characteristics other than those provided for in) appears on 153 US grants and 96 published applications in this corpus.
Search patents in F01B- Granted patents
- 153
- Published applications
- 96
- Assignees
- 71
- Inventors
- 232
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 9 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 1 | 3 |
| 2004 | 3 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 7 |
| 2007 | 3 | 2 |
| 2008 | 4 | 8 |
| 2009 | 0 | 0 |
| 2010 | 5 | 3 |
| 2011 | 2 | 4 |
| 2012 | 2 | 3 |
| 2013 | 5 | 14 |
| 2014 | 2 | 9 |
| 2015 | 7 | 8 |
| 2016 | 8 | 7 |
| 2017 | 5 | 5 |
| 2018 | 6 | 6 |
| 2019 | 4 | 1 |
| 2020 | 7 | 6 |
| 2021 | 3 | 0 |
| 2022 | 1 | 2 |
| 2023 | 0 | 0 |
| 2024 | 4 | 1 |
| 2025 | 1 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vacuum engine11 Aug 2026US 12,704,068 B2Energie-Innovation AG
- Power system with carbon dioxide working fluid, generator, and propulsion system10 Mar 2026US 12,571,310 B2
- Free-piston Stirling engine7 Oct 2025US 12,435,911 B2Twinbird Corporation
- Power system with carbon dioxide working fluid, generator, and propulsion system17 Sep 2024US 12,091,978 B1
- Pressure control system for a closed-cycle engine3 Sep 2024US 12,078,066 B1Hyliion Holdings Corp.
- Reciprocating mechanical devices and methods of operation1 Oct 2026US 2026/0298321 A1
- System for energy storage by fluid compression and concentration difference in a liquid solution30 Apr 2026US 2026/0117735 A1
- Power system with carbon dioxide working fluid, generator, and propulsion system28 Aug 2025US 2025/0270931 A1
- Vacuum Engine17 Apr 2025US 2025/0122804 A1Energie-Innovation AG
- Free-piston stirling engine14 Nov 2024US 2024/0376850 A1Twinbird Corporation
Most cited
By later US patents
- Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange119US 8,436,489 B2LightSail Energy, Inc. · 2013
- Hydraulic and pneumatic cylinder construction106US 6,439,103 B1Vector Engineering Co. · 2002
- Piston reciprocating compressed air engine80US 4,651,525 A1987
- Transient energy release microdevices and methods58US 5,367,878 AUniversity of Southern California · 1994
- Electrochemical prime mover49US 4,402,817 A1983