Trademark applications and grants for Ashworth William J. Ashworth William J has 1 trademark applications. The latest application filed is for "AUDIO C CURITY"
Patent Application | Date |
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ELECTROMAGNETIC AUDIO TRANSDUCER WITH MICRO ADJUSTABLE CORE 20020181730 - 09/873437 Ashworth, William J. | 2002-12-05 |
Method for attaching an audio transducer to a string musical instrument 5,031,501 - 07/495,698 Ashworth July 16, 1 | 1991-07-16 |
Electromagnetic speaker with bucking parallel high and low frequency coils drives sounding board and second diaphragm or external apparatus via magnetic coupling and having adjustable air gap and slot pole piece 4,151,379 - 05/882,376 Ashworth April 24, 1 | 1979-04-24 |
Transducer mounting to sounding board 3,925,627 - 05/478,937 Ashworth December 9, 1 | 1975-12-09 |
LOUDSPEAKER WITH IMPROVED VOICE COIL SUSPENSION 3,609,253 - 04/726,434 Ashworth September 28, 1 | 1971-09-28 |
Mark Image Registration | Serial | Trademark Application Date |
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![]() "AUDIO C CURITY" 74044949 |
AUDIO C CURITY 1990-04-02 |
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