H05K 3/4688

Composite multilayer circuits, i.e. comprising insulating layers having different properties

Official title: {Composite multilayer circuits, i.e. comprising insulating layers having different properties (having a special base or central core H05K3/4602)}

H05K3/4688 (Composite multilayer circuits, i.e. comprising insulating layers having different properties) appears on 1,494 US grants and 1,677 published applications in this corpus.

Search patents in H05K

Granted patents: 1,494
Published applications: 1,677
Assignees: 594
Inventors: 3,257
Latest grant: 8 Sep 2026

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H05K 3/4688: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	1	0
1977	2	0
1978	2	0
1979	2	0
1980	2	0
1981	0	0
1982	1	0
1983	1	0
1984	2	0
1985	4	0
1986	7	0
1987	4	0
1988	3	0
1989	5	0
1990	8	0
1991	8	0
1992	16	0
1993	11	0
1994	10	0
1995	11	0
1996	9	0
1997	13	0
1998	17	0
1999	21	0
2000	12	0
2001	16	11
2002	28	33
2003	32	36
2004	29	44
2005	22	56
2006	35	65
2007	41	67
2008	45	69
2009	33	89
2010	48	60
2011	56	66
2012	58	53
2013	54	40
2014	48	70
2015	59	82
2016	64	72
2017	59	61
2018	60	74
2019	74	73
2020	75	85
2021	74	97
2022	71	93
2023	67	100
2024	67	65
2025	74	58
2026	33	58

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

Composite multilayer circuits, i.e. comprising insulating layers having different properties

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