F01B 21/00
Combinations of two or more machines or engines
Official title: Combinations of two or more machines or engines (F01B23/00 takes precedence)
F01B21/00 (Combinations of two or more machines or engines) appears on 70 US grants and 59 published applications in this corpus.
Search patents in F01B- Granted patents
- 70
- Published applications
- 59
- Assignees
- 32
- Inventors
- 103
- Latest grant
- 27 Feb 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 7 |
| 2011 | 2 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 6 | 4 |
| 2015 | 3 | 5 |
| 2016 | 6 | 4 |
| 2017 | 2 | 2 |
| 2018 | 3 | 5 |
| 2019 | 2 | 5 |
| 2020 | 4 | 1 |
| 2021 | 7 | 5 |
| 2022 | 2 | 6 |
| 2023 | 1 | 3 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Diesel-steam power plant27 Feb 2024US 11,913,402 B2
- Internal combustion engine with adaptable piston stroke15 Aug 2023US 11,725,576 B2
- Ship drive system and retrofitting method for a ship drive system11 Oct 2022US 11,466,613 B2Fuelsave GmbH
- Internal combustion engine having adjustable linking of its engine units22 Feb 2022US 11,255,258 B2Fuelsave GmbH
- Piston internal combustion engine with generator10 Aug 2021US 11,085,370 B2
- Internal Combustion Engine with Planetary Piston Gears30 Nov 2023US 2023/0383692 A1
- Diesel-steam power plant19 Oct 2023US 2023/0332560 A1
- Expander systems for harnessing energy from pressurized fluid flow22 Jun 2023US 2023/0193759 A1CNX Resources Corporation
- Combined cycle power device21 Jul 2022US 2022/0228511 A1
- Combined cycle power device21 Jul 2022US 2022/0228512 A1
Most cited
By later US patents
- Energy management system for hybrid electric vehicles136US 6,230,496 B1Lockheed Martin Control Systems · 2001
- Steam generating apparatus72US 3,998,049 AG & K Development Co., Inc. · 1976
- Use of metallic peroxides in biormediation56US 5,264,018 APlant Research Laboratories · 1993
- Combustion-driven hydroelectric generating system with closed loop control49US 6,739,131 B12004
- Power plant41US 4,195,481 A1980