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Patent applications and USPTO patent grants for Huttunen; Heikki J..The latest application filed is for "dust protection of sound transducer".
Patent | Date |
---|---|
Dust protection of sound transducer Grant 9,473,838 - Soininen , et al. October 18, 2 | 2016-10-18 |
Dust Protection of Sound Transducer App 20140146993 - Soininen; Toni O. ;   et al. | 2014-05-29 |
Dust protection of sound transducer Grant 8,644,530 - Soininen , et al. February 4, 2 | 2014-02-04 |
Dust Protection of Sound Transducer App 20130083957 - Soininen; Toni O. ;   et al. | 2013-04-04 |
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