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E02F 9/2289

Closed circuit

Official title: {Closed circuit}

E02F9/2289 (Closed circuit) appears on 243 US grants and 274 published applications in this corpus.

Search patents in E02F

Granted patents: 243
Published applications: 274
Assignees: 53
Inventors: 353
Latest grant: 15 Sep 2026

Filings by year

E02F 9/2289: granted patents and published applications per publication year
Year	Granted patents	Published applications
2004	0	1
2005	0	0
2006	0	0
2007	0	2
2008	0	5
2009	1	2
2010	0	2
2011	3	3
2012	3	5
2013	4	42
2014	17	23
2015	22	19
2016	8	22
2017	31	17
2018	14	9
2019	14	8
2020	15	18
2021	15	17
2022	20	33
2023	16	21
2024	34	10
2025	16	11
2026	10	4

By publication year. 2026 runs to 8 Oct.

Recent patents

Hydraulic system for work machine, and work machine15 Sep 2026US RE51,031 E1Kubota Corporation
Construction machine1 Sep 2026US 12,723,605 B2Hitachi Construction Machinery Co., Ltd.
Construction machine25 Aug 2026US 12,716,201 B2Hitachi Construction Machinery Co., Ltd.
Hydraulic system having a conditioning circuit4 Aug 2026US 12,698,788 B2Robert Bosch GmbH
Energy storage and reutilization for a single-rod electro-hydrostatic actuator9 Jun 2026US 12,650,138 B2University of Manitoba

Most cited

By later US patents