F01K 23/00

Plants characterised by more than one engine delivering power external to the

Official title: Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids

F01K23/00 (Plants characterised by more than one engine delivering power external to the) appears on 2,688 US grants and 2,720 published applications in this corpus.

Search patents in F01K

Granted patents: 2,688
Published applications: 2,720
Assignees: 836
Inventors: 4,642
Latest grant: 15 Sep 2026

Filings by year

F01K 23/00: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	32	0
1977	20	0
1978	19	0
1979	14	0
1980	18	0
1981	21	0
1982	20	0
1983	11	0
1984	25	0
1985	22	0
1986	22	0
1987	20	0
1988	9	0
1989	18	0
1990	34	0
1991	24	0
1992	12	0
1993	29	0
1994	35	0
1995	40	0
1996	29	0
1997	37	0
1998	46	0
1999	32	0
2000	43	0
2001	60	28
2002	47	32
2003	44	37
2004	36	73
2005	40	40
2006	34	40
2007	20	53
2008	23	47
2009	20	98
2010	38	143
2011	51	153
2012	65	158
2013	96	165
2014	113	187
2015	108	186
2016	120	179
2017	143	203
2018	169	173
2019	156	147
2020	162	112
2021	126	93
2022	105	95
2023	88	74
2024	76	96
2025	75	70
2026	41	38

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Plants characterised by more than one engine delivering power external to the

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