G01L 23/00

Devices or apparatus for measuring or indicating or recording rapid changes, such

Official title: Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid

G01L23/00 (Devices or apparatus for measuring or indicating or recording rapid changes, such) appears on 1,484 US grants and 990 published applications in this corpus.

Search patents in G01L

Granted patents: 1,484
Published applications: 990
Assignees: 466
Inventors: 2,779
Latest grant: 6 Oct 2026

Filings by year

G01L 23/00: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	19	0
1977	11	0
1978	14	0
1979	14	0
1980	11	0
1981	27	0
1982	34	0
1983	44	0
1984	54	0
1985	26	0
1986	29	0
1987	25	0
1988	14	0
1989	16	0
1990	24	0
1991	19	0
1992	21	0
1993	25	0
1994	29	0
1995	26	0
1996	24	0
1997	24	0
1998	33	0
1999	22	0
2000	20	0
2001	25	14
2002	26	21
2003	37	35
2004	40	61
2005	41	46
2006	38	47
2007	45	45
2008	29	59
2009	44	57
2010	42	57
2011	33	35
2012	36	31
2013	36	43
2014	28	35
2015	39	45
2016	35	58
2017	48	60
2018	49	33
2019	43	35
2020	33	48
2021	43	36
2022	41	24
2023	13	20
2024	14	17
2025	13	16
2026	8	12

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

Devices or apparatus for measuring or indicating or recording rapid changes, such

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