Houston, TX, United States of America

Zap-lok Systems International, Inc.


USPTO Granted Patents = 3

Forward Citations = 46

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3 inventors (with patents filed for the assignee):

goldMedal Marvin C Echols (2 out of 2 patents)

silverMedal David L Gruller (1 out of 3 patents)

bronzeMedal Joe C McCaslin (1 out of 1 patent)


3 patents:

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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#1,188 in Houston, TX

#4,679 in Texas

#71,949 in US

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Houston, TX, United States of America
Forward Citations = 46

3 inventors:

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