H04R 1/2815
Of the bass reflex type
Official title: {of the bass reflex type}
H04R1/2815 (Of the bass reflex type) appears on 888 US grants and 885 published applications in this corpus.
Search patents in H04R- Granted patents
- 888
- Published applications
- 885
- Assignees
- 347
- Inventors
- 1,654
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 8 | 0 |
| 1980 | 12 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 8 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 14 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 6 | 4 |
| 2002 | 6 | 4 |
| 2003 | 6 | 4 |
| 2004 | 3 | 17 |
| 2005 | 7 | 17 |
| 2006 | 9 | 10 |
| 2007 | 8 | 16 |
| 2008 | 7 | 15 |
| 2009 | 6 | 24 |
| 2010 | 9 | 14 |
| 2011 | 13 | 16 |
| 2012 | 20 | 20 |
| 2013 | 23 | 27 |
| 2014 | 24 | 23 |
| 2015 | 15 | 34 |
| 2016 | 36 | 43 |
| 2017 | 51 | 73 |
| 2018 | 62 | 57 |
| 2019 | 68 | 64 |
| 2020 | 53 | 52 |
| 2021 | 58 | 69 |
| 2022 | 60 | 68 |
| 2023 | 50 | 57 |
| 2024 | 76 | 78 |
| 2025 | 54 | 35 |
| 2026 | 30 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Acoustic output devices8 Sep 2026US 12,732,744 B2Shenzhen Shokz Co., Ltd.
- Projector having speaker unit with air circulation path25 Aug 2026US 12,717,221 B2Seiko Epson Corporation
- Earphones11 Aug 2026US 12,707,182 B2Shenzhen Shokz Co., Ltd.
- Acoustic insert for earpiece4 Aug 2026US 12,701,354 B23M Innovative Properties Company
- Loudspeaker cabinet incorporating curved vents14 Jul 2026US 12,684,285 B1Robotham Creative, Inc.
- Acoustic output devices24 Sep 2026US 2026/0292391 A1Shenzhen Shokz Co., Ltd.
- Acoustic output devices24 Sep 2026US 2026/0292392 A1Shenzhen Shokz Co., Ltd.
- Open earphones24 Sep 2026US 2026/0292393 A1Shenzhen Shokz Co., Ltd.
- Speaker assemblies and earphones13 Aug 2026US 2026/0238919 A1Shenzhen Shokz Co., Ltd.
- Audio speaker system30 Jul 2026US 2026/0222718 A1Merry Electronics North America Inc., Doing Business AS Sonavox Mena
Most cited
By later US patents
- Electroacoustical transducing with low frequency augmenting devices304US 8,238,578 B2Bose Corporation · 2012
- Earphone296US 5,949,896 ASony Corporation · 1999
- Tunable earphone244US 8,831,266 B1Cooler Master Technology Inc. · 2014
- Open-air type earphone201US 4,742,887 ASony Corporation · 1988
- Weather resistant porting180US 7,039,212 B2Britannia Investment Corporation · 2006