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Patent applications and USPTO patent grants for Murayama; Shigeharu.The latest application filed is for "electro-acoustic converters, electronic devices, waterproof covers, and air leakage test methods for electro-acoustic converters".
Patent | Date |
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Electro-Acoustic Converters, Electronic Devices, Waterproof Covers, and Air Leakage Test Methods For Electro-Acoustic Converters App 20150172797 - Murayama; Shigeharu | 2015-06-18 |
Electro-acoustic converters, electronic devices, waterproof covers, and air leakage test methods for electro-acoustic converters Grant 8,942,401 - Murayama January 27, 2 | 2015-01-27 |
Electro-Acoustic Converters, Electronic Devices, Waterproof Covers, and Air Leakage Test Methods for Electro-Acoustic Converters App 20110261986 - Murayama; Shigeharu | 2011-10-27 |
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