B29L 2031/38
Loudspeaker cones
Official title: Loudspeaker cones; Acoustic diaphragms
B29L2031/38 (Loudspeaker cones) appears on 19 US grants and 33 published applications in this corpus.
Search patents in B29L- Granted patents
- 19
- Published applications
- 33
- Assignees
- 19
- Inventors
- 72
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 4 |
| 2016 | 0 | 3 |
| 2017 | 1 | 4 |
| 2018 | 2 | 5 |
| 2019 | 5 | 3 |
| 2020 | 2 | 5 |
| 2021 | 0 | 4 |
| 2022 | 2 | 0 |
| 2023 | 2 | 1 |
| 2024 | 3 | 3 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Preparation method of a passive horn2 Jun 2026US 12,643,270 B2Tymphany Acoustic Technology (Huizhou) Co., Ltd.
- Method for manufacturing an acoustic panel with oblique cavities14 Apr 2026US 12,600,119 B2Safran Nacelles
- Method for manufacturing an acoustic panel by welding15 Oct 2024US 12,115,734 B2Safran
- Preparation method of a passive horn14 May 2024US 11,981,061 B2Tymphany Acoustic Technology (Huizhou) Co., Ltd.
- Micro transducer molding16 Jan 2024US 11,877,132 B2Bose Corporation
- Method for manufacturing an acoustic panel with oblique cavities31 Oct 2024US 2024/0359421 A1Safran Nacelles
- Method for manufacturing an acoustic panel by welding8 Aug 2024US 2024/0262042 A1Safran
- Preparation method of a passive horn1 Aug 2024US 2024/0253281 A1Tymphany Acoustic Technology (Huizhou) Co., Ltd.
- Micro transducer molding22 Jun 2023US 2023/0199416 A1Bose Corporation
- Passive horn integrally formed by using thermoplastic vulcanized rubber and preparation method thereof23 Dec 2021US 2021/0394410 A1Tymphany Acoustic Technology (Huizhou) Co., Ltd.
Most cited
By later US patents
- Graphene composite acoustic diaphragm16US 9,900,698 B2Apple Inc. · 2018
- Non-dispensing manufacturing process for making speaker and speaker thereof3US 11,432,091 B2Tymphany Acoustic Technology Limited · 2022
- Passive horn integrally formed by using thermoplastic vulcanized rubber and preparation method thereof3US 11,780,131 B2Tymphany Acoustic Technology (Huizhou) Co., Ltd. · 2023
- Loudspeaker diaphragm, loudspeaker, and production method for loudspeaker diaphragm2US 10,484,794 B2Panasonic Intellectual Property Management Co., Ltd. · 2019
- Passive horn integrally formed by using thermoplastic vulcanized rubber and preparation method thereof2US 11,338,483 B2Tymphany Acoustic Technology (Huizhou) Co., Ltd. · 2022