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| 10085080 |
Earphone assemblies with multiple subassembly housings |
Robert Boyd, Carlos M. Santana, Vijay Karthik Koneru |
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| 10063962 |
Vented acoustic enclosures and related systems |
— |
2018-08-28 |
| 9219957 |
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| 9173045 |
Headphone response optimization |
Douglas K. Hogue, Alan R. Olson |
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Earphone device with impedance correction unit |
Douglas K. Hogue |
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| 9071906 |
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| 8315419 |
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Allen T. Graff, Robert Preston Parker |
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| D324522 |
Loudspeaker |
Robert A. Dizack |
1992-03-10 |
