patentgrepDocs Get an API key

F04B 45/022

With two or more bellows in parallel

Official title: {with two or more bellows in parallel}

F04B45/022 (With two or more bellows in parallel) appears on 45 US grants and 53 published applications in this corpus.

Search patents in F04B

Granted patents: 45
Published applications: 53
Assignees: 30
Inventors: 76
Latest grant: 17 Feb 2026

Filings by year

F04B 45/022: granted patents and published applications per publication year
Year	Granted patents	Published applications
1988	1	0
1989	0	0
1990	0	0
1991	0	0
1992	1	0
1993	0	0
1994	0	0
1995	2	0
1996	0	0
1997	1	0
1998	1	0
1999	0	0
2000	0	0
2001	0	0
2002	1	0
2003	1	0
2004	0	0
2005	0	4
2006	0	2
2007	2	7
2008	0	1
2009	2	2
2010	2	2
2011	0	1
2012	1	1
2013	3	1
2014	0	3
2015	2	0
2016	3	1
2017	0	6
2018	0	3
2019	5	2
2020	4	7
2021	3	1
2022	4	3
2023	1	0
2024	2	2
2025	1	1
2026	2	3

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

Recent patents

Most cited

By later US patents