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Patent applications and USPTO patent grants for Gehrke; Robert.The latest application filed is for "high efficiency audio amplifier".
Patent | Date |
---|---|
High efficiency audio amplifier Grant 8,436,683 - Gehrke May 7, 2 | 2013-05-07 |
High Efficiency Audio Amplifier App 20120133432 - Gehrke; Robert | 2012-05-31 |
Audio amplifier faceplate Grant D653,250 - Gehrke January 31, 2 | 2012-01-31 |
Audio amplifier faceplate Grant D648,719 - Gehrke November 15, 2 | 2011-11-15 |
Audio amplifier faceplate Grant D645,853 - Gehrke September 27, 2 | 2011-09-27 |
Audio amplifier faceplate Grant D641,015 - Gehrke July 5, 2 | 2011-07-05 |
USB sound card Grant D634,326 - Gehrke March 15, 2 | 2011-03-15 |
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