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For the Inventor, By the Inventor

West Newton, MA, United States of America

Qsi Systems, Inc.


USPTO Granted Patents = 3

Forward Citations = 58

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3 inventors (with patents filed for the assignee):

goldMedal Larry K Baxter (1 out of 7 patents)

silverMedal David A Folsom (1 out of 1 patent)

bronzeMedal Charles E Ricciardi (1 out of 1 patent)


3 patents:

1. 4670786 - Video-camera synchronizing system (1987-06-02),
2. 4051524 - Sequential video switching system (1977-09-27),
3. 4001881 - Switched video recording system (1977-01-04),
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USPTO Data Jan 1 1976 - Sep 29 2026

3 Patents

#5 in West Newton, MA

#3,960 in Massachusetts

#73,766 in US

West Newton, MA (US)
West Newton, MA, United States of America

Qsi Systems, Inc.

Forward Citations = 58

3 inventors:

goldMedal Larry K Baxter (1 out of 7 patents)

silverMedal David A Folsom (1 out of 1 patent)

bronzeMedal Charles E Ricciardi (1 out of 1 patent)

Please report any incorrect information to [email protected]
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