H01H 51/2227

In which the movable part comprises at least one permanent magnet, sandwiched

Official title: {in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit (H01H51/2209 takes precedence)}

H01H51/2227 (In which the movable part comprises at least one permanent magnet, sandwiched) appears on 95 US grants and 49 published applications in this corpus.

Search patents in H01H

Granted patents: 95
Published applications: 49
Assignees: 40
Inventors: 159
Latest grant: 18 Aug 2026

Filings by year

H01H 51/2227: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	2	0
1977	0	0
1978	1	0
1979	0	0
1980	2	0
1981	1	0
1982	4	0
1983	1	0
1984	3	0
1985	2	0
1986	9	0
1987	10	0
1988	1	0
1989	2	0
1990	0	0
1991	2	0
1992	1	0
1993	0	0
1994	1	0
1995	0	0
1996	2	0
1997	0	0
1998	0	0
1999	3	0
2000	4	0
2001	2	0
2002	0	2
2003	3	1
2004	2	1
2005	0	1
2006	0	4
2007	1	1
2008	2	1
2009	2	1
2010	1	2
2011	2	3
2012	4	2
2013	2	3
2014	1	2
2015	3	2
2016	0	1
2017	3	2
2018	0	5
2019	2	2
2020	7	2
2021	1	1
2022	5	0
2023	0	0
2024	0	9
2025	0	0
2026	1	1

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

Recent patents

Most cited

By later US patents