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For the Inventor, By the Inventor

Tahoe City, CA, United States of America

Precision Instrument Design


USPTO Granted Patents = 2

Forward Citations = 46

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1 inventor (with patents filed for the assignee):

goldMedal George M Grass (2 out of 7 patents)


2 patents:

1. 5599688 - Device and method for circulating fluid over a membrane (1997-02-04),
2. 5591636 - Membrane holder (1997-01-07),
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USPTO Data Jan 1 1976 - Jan 13 2026

2 Patents

#1 in Tahoe City, CA

#20,571 in California

#92,764 in US

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Tahoe City, CA, United States of America

Precision Instrument Design

Forward Citations = 46

1 inventor:

goldMedal George M Grass (2 out of 7 patents)

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