patentgrepDocs Get an API key

H02K 1/148

Sectional cores

Official title: {Sectional cores (H02K1/141 takes precedence)}

H02K1/148 (Sectional cores) appears on 1,327 US grants and 1,708 published applications in this corpus.

Search patents in H02K

Granted patents: 1,327
Published applications: 1,708
Assignees: 582
Inventors: 3,176
Latest grant: 6 Oct 2026

Filings by year

H02K 1/148: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	2	0
1977	3	0
1978	2	0
1979	0	0
1980	1	0
1981	0	0
1982	2	0
1983	1	0
1984	1	0
1985	1	0
1986	0	0
1987	5	0
1988	2	0
1989	3	0
1990	4	0
1991	2	0
1992	1	0
1993	2	0
1994	2	0
1995	3	0
1996	4	0
1997	6	0
1998	11	0
1999	12	0
2000	20	0
2001	12	7
2002	30	36
2003	22	34
2004	31	61
2005	34	46
2006	40	53
2007	32	46
2008	32	44
2009	36	62
2010	41	49
2011	34	56
2012	38	69
2013	37	80
2014	51	61
2015	38	70
2016	52	52
2017	53	69
2018	44	80
2019	77	98
2020	70	75
2021	78	113
2022	72	120
2023	68	113
2024	98	100
2025	73	66
2026	44	48

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

Recent patents

Installation structure of stator core for axial gap motor6 Oct 2026US 12,756,247 B2Subaru Corporation
Electrical insulator with projections in inner walls around stator core teeth for motor15 Sep 2026US 12,738,778 B2Aichi Electric Co., Ltd.
Insulator, stator, and rotating electrical machine using these1 Sep 2026US 12,726,055 B2Kawamata Seiki Co., Ltd.
Core piece, stator core, stator, rotary electric machine, and method for producing core piece25 Aug 2026US 12,719,317 B2Sumitomo Electric Industries, Ltd.
Segmented coil carrier with groove wedges made of multiple pieces18 Aug 2026US 12,712,402 B2Rolls-Royce Deutschland Ltd & Co KG

Most cited

By later US patents