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H01F 1/1535

By powder metallurgy

Official title: {by powder metallurgy, e.g. spark erosion}

H01F1/1535 (By powder metallurgy) appears on 27 US grants and 29 published applications in this corpus.

Search patents in H01F

Granted patents: 27
Published applications: 29
Assignees: 24
Inventors: 102
Latest grant: 17 Feb 2026

Filings by year

H01F 1/1535: granted patents and published applications per publication year
Year	Granted patents	Published applications
1980	1	0
1981	0	0
1982	0	0
1983	1	0
1984	0	0
1985	1	0
1986	3	0
1987	1	0
1988	0	0
1989	0	0
1990	1	0
1991	1	0
1992	0	0
1993	1	0
1994	0	0
1995	1	0
1996	1	0
1997	0	0
1998	1	0
1999	0	0
2000	0	0
2001	0	1
2002	0	0
2003	1	0
2004	0	0
2005	0	0
2006	0	0
2007	0	0
2008	0	0
2009	0	0
2010	0	0
2011	0	0
2012	0	0
2013	0	0
2014	0	0
2015	0	2
2016	0	1
2017	1	3
2018	1	3
2019	1	1
2020	1	3
2021	2	0
2022	1	2
2023	2	4
2024	1	6
2025	1	3
2026	2	0

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

Recent patents

Amorphous alloy soft magnetic powder, dust core, magnetic element, and electronic device17 Feb 2026US 12,553,116 B2Seiko Epson Corporation
Soft magnetic powder and method for manufacturing the same, coil component including soft magnetic powder, and method for manufacturing magnetic material including soft magnetic powder20 Jan 2026US 12,528,118 B2Murata Manufacturing Co., Ltd.
Methods for preparing magnetostrictive powder and magnetostrictive coating22 Jul 2025US 12,367,995 B2China Special Equipment Inspection & Research Institute
Amorphous alloy soft magnetic powder, dust core, magnetic element, and electronic device14 May 2024US 11,984,245 B2Seiko Epson Corporation
Soft magnetic powder, powder magnetic core, magnetic element, and electronic device3 Jan 2023US 11,545,285 B2Seiko Epson Corporation

Most cited

By later US patents