Alan Robert Selfridge

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Los Gatos, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Piezoelectric film sonic emitter
- Patent number 7,376,236
- Issue date May 20, 2008
- American Technology Corporation
- Joseph O. Norris
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric film sonic emitter
- Patent number 6,606,389
- Issue date Aug 12, 2003
- American Technology Corporation
- Alan Robert Selfridge
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Method and apparatus to provide dynamic ultrasonic measurement of r...
- Patent number 6,571,632
- Issue date Jun 3, 2003
- The Torrington Company
- Richard W. Browner
- G01 - MEASURING TESTING
Information Patent Grant
Piezoelectric film sonic emitter
- Patent number 6,011,855
- Issue date Jan 4, 2000
- American Technology Corporation
- Alan R. Selfridge
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Stylus position digitizer using acoustic waves
- Patent number 5,691,959
- Issue date Nov 25, 1997
- Fujitsu, Ltd.
- James A. Kriewall
- G06 - COMPUTING CALCULATING COUNTING