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H04R 1/323

For loudspeakers

Official title: {for loudspeakers (H04R1/34 and H04R1/40 take precedence)}

H04R1/323 (For loudspeakers) appears on 610 US grants and 690 published applications in this corpus.

Search patents in H04R

Granted patents: 610
Published applications: 690
Assignees: 290
Inventors: 1,369
Latest grant: 22 Sep 2026

Filings by year

H04R 1/323: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	2	0
1977	4	0
1978	3	0
1979	3	0
1980	3	0
1981	3	0
1982	4	0
1983	1	0
1984	5	0
1985	2	0
1986	4	0
1987	1	0
1988	1	0
1989	6	0
1990	2	0
1991	4	0
1992	4	0
1993	2	0
1994	2	0
1995	1	0
1996	0	0
1997	0	0
1998	1	0
1999	2	0
2000	1	0
2001	0	0
2002	2	5
2003	2	2
2004	5	6
2005	1	3
2006	1	6
2007	4	13
2008	4	8
2009	4	4
2010	3	13
2011	5	8
2012	8	13
2013	11	21
2014	17	17
2015	15	24
2016	33	48
2017	42	57
2018	49	49
2019	62	55
2020	44	47
2021	48	42
2022	49	46
2023	26	42
2024	40	62
2025	37	45
2026	37	54

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

Recent patents

Sound-absorbing particle, preparation method thereof, and speaker22 Sep 2026US 12,744,022 B2AAG Microtech (Changzhou) Co., Ltd.
Acoustic devices15 Sep 2026US 12,739,560 B2Shenzhen Shokz Co., Ltd.
Apparatus15 Sep 2026US 12,739,565 B2LG Display Co., Ltd.
Speaker control method and device, terminal equipment and computer-readable storage medium1 Sep 2026US 12,726,758 B2AAC Technologies (Nanjing) Co., Ltd.
Spatial metadata direction harmonization1 Sep 2026US 12,726,759 B2Nokia Technologies Oy

Most cited

By later US patents