H04R
Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers
Official title: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
H04R (Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers) appears on 56,162 US grants and 62,896 published applications in this corpus.
Search patents in H04R- Granted patents
- 56,162
- Published applications
- 62,896
- Assignees
- 9,832
- Inventors
- 67,735
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 165 | 0 |
| 1977 | 201 | 0 |
| 1978 | 173 | 0 |
| 1979 | 143 | 0 |
| 1980 | 174 | 0 |
| 1981 | 161 | 0 |
| 1982 | 168 | 0 |
| 1983 | 179 | 0 |
| 1984 | 211 | 0 |
| 1985 | 176 | 0 |
| 1986 | 174 | 0 |
| 1987 | 156 | 0 |
| 1988 | 188 | 0 |
| 1989 | 258 | 0 |
| 1990 | 208 | 0 |
| 1991 | 204 | 0 |
| 1992 | 224 | 0 |
| 1993 | 232 | 0 |
| 1994 | 252 | 0 |
| 1995 | 253 | 0 |
| 1996 | 280 | 0 |
| 1997 | 310 | 0 |
| 1998 | 487 | 0 |
| 1999 | 385 | 0 |
| 2000 | 430 | 0 |
| 2001 | 385 | 229 |
| 2002 | 461 | 730 |
| 2003 | 532 | 825 |
| 2004 | 625 | 1014 |
| 2005 | 439 | 1161 |
| 2006 | 673 | 1271 |
| 2007 | 641 | 1580 |
| 2008 | 558 | 1491 |
| 2009 | 641 | 1701 |
| 2010 | 826 | 1682 |
| 2011 | 1107 | 1768 |
| 2012 | 1930 | 1852 |
| 2013 | 1621 | 2238 |
| 2014 | 1823 | 2568 |
| 2015 | 2204 | 3011 |
| 2016 | 2870 | 3124 |
| 2017 | 3210 | 3466 |
| 2018 | 3307 | 3635 |
| 2019 | 3771 | 3805 |
| 2020 | 3806 | 4102 |
| 2021 | 3329 | 4063 |
| 2022 | 3505 | 4058 |
| 2023 | 3335 | 3990 |
| 2024 | 3338 | 3786 |
| 2025 | 3264 | 3259 |
| 2026 | 2169 | 2487 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- H04R 1/00Details of transducers, loudspeakers or microphones28,383
- H04R 3/00Circuits for transducers16,535
- H04R 25/00Electric hearing aids9,940
- H04R 5/00Stereophonic arrangements9,491
- H04R 2499/00Aspects covered by h04r or h04s not otherwise provided for in theirIndexing code9,069
- H04R 2201/00Details of transducers, loudspeakers or microphones covered by h04r1/00 but not providedIndexing code7,928
- H04R 2420/00Details of connection covered by h04r, not provided for in its groupsIndexing code7,125
- H04R 2225/00Details of deaf aids covered by h04r25/00, not provided for in anyIndexing code5,541
All 33 main groupsShow fewer
- H04R 29/00Monitoring arrangements5,404
- H04R 2460/00Details of hearing devices, i.e. of ear- or headphones covered by h04r1/10Indexing code5,360
- H04R 2430/00Signal processing covered by h04r, not provided for in its groupsIndexing code5,186
- H04R 9/00Transducers of moving-coil, moving-strip, or moving-wire type4,989
- H04R 7/00Diaphragms for electromechanical transducers4,376
- H04R 19/00Electrostatic transducers3,484
- H04R 17/00Piezoelectric transducers3,143
- H04R 27/00Public address systems2,987
- H04R 31/00Apparatus or processes specially adapted for the manufacture of transducers or diaphragms2,727
- H04R 2227/00Details of public address [pa] systems covered by h04r27/00 but not providedIndexing code2,440
- H04R 2410/00MicrophonesIndexing code2,199
- H04R 2400/00LoudspeakersIndexing code1,998
- H04R 2205/00Details of stereophonic arrangements covered by h04r5/00 but not provided for inIndexing code1,185
- H04R 2307/00Details of diaphragms or cones for electromechanical transducers, their suspension or theirIndexing code1,061
- H04R 23/00Transducers other than those covered by groups h04r9/00 - h04r21/00983
- H04R 11/00Transducers of moving-armature or moving-core type715
- H04R 2209/00Details of transducers of the moving-coil, moving-strip, or moving-wire type covered byIndexing code680
- H04R 2203/00Details of circuits for transducers, loudspeakers or microphones covered by h04r3/00 butIndexing code476
- H04R 2217/00Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by h04r15/00 or h04r17/00Indexing code471
- H04R 2440/00Bending wave transducers covered by h04r, not provided for in its groupsIndexing code447
- H04R 2231/00Details of apparatus or processes specially adapted for the manufacture of transducersIndexing code200
- H04R 2207/00Details of diaphragms or cones for electromechanical transducers or their suspension coveredIndexing code159
- H04R 15/00Magnetostrictive transducers127
- H04R 13/00Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet103
- H04R 21/00Variable-resistance transducers34
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Most cited
By later US patents
- Method and apparatus for controlling multimedia players in a multi-zone system2,132US 7,571,014 B1Sonos, Inc. · 2009
- System and method for synchronizing operations among a plurality of independently clocked digital data processing devices1,949US 8,234,395 B2Sonos, Inc. · 2012
- Controlling and manipulating groupings in a multi-zone media system1,881US 8,483,853 B1Sonos, Inc. · 2013
- Method and device for obtaining playlist content over a network1,821US 8,045,952 B2Horsham Enterprises, LLC · 2011
- Audio network distribution system1,807US 7,643,894 B2Netstreams, LLC · 2010