For the Inventor, By the Inventor

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Andover, MA, United States of America

Grouptek, Inc.

USPTO Granted Patents = 3

Forward Citations = 128

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1 inventor (with patents filed for the assignee):

Donald F H Wallach (3 out of 4 patents)

3 patents: Sort by Forward Citations

1. 6576474 - Apparatus and method of monitoring an analyte (2003-06-10),

2. 6495368 - Methods and devices for detecting microbial spoilage in food products (2002-12-17),

3. 6428748 - Apparatus and method of monitoring an analyte (2002-08-06),

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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#48 in Andover, MA

#3,878 in Massachusetts

#72,011 in US

Andover, MA, United States of America

Grouptek, Inc.

Forward Citations = 128

1 inventor:

Donald F H Wallach (3 out of 4 patents)

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