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Patent applications and USPTO patent grants for Welker; Andrew C..The latest application filed is for "outdoor loudspeaker with passive radiator".
Patent | Date |
---|---|
Loudspeaker with shaped sound field Grant 6,996,243 - Welker , et al. February 7, 2 | 2006-02-07 |
Outdoor loudspeaker with passive radiator App 20040231911 - Welker, Andrew C. ;   et al. | 2004-11-25 |
Speaker Grant D484,492 - Welker , et al. December 30, 2 | 2003-12-30 |
Loudspeaker with shaped sound field App 20030179899 - Welker, Andrew C. ;   et al. | 2003-09-25 |
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