David Schachter

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San Francisco County, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Radio signal controlled digital clock
- Patent number 4,823,328
- Issue date Apr 18, 1989
- Charles C. Conklin
- G04 - HOROLOGY
Information Patent Grant
High precision radio signal controlled continuously updated digital...
- Patent number 4,768,178
- Issue date Aug 30, 1988
- Precision Standard Time, Inc.
- Charles C. Conklin
- G04 - HOROLOGY