Zap-Lok Systems International, Inc.

Calculating rank

USPTO Granted Patents = 3

Forward Citations = 48

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3 inventors (with patents filed for the assignee):

Marvin C Echols (2 out of 2 patents)

David L Gruller (1 out of 3 patents)

Joe C McCaslin (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4120083 - Method of pipe joining (1978-10-17),

2. 4091648 - Pipe grooving systems (1978-05-30),

3. 4064619 - Method of joining plastic coated pipe (1977-12-27),

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USPTO Data Jan 1 1976 - Nov 3 2026

3 Patents

#1,215 in Houston, TX

#4,805 in Texas

#73,976 in US

Houston, TX, United States of America

Zap-Lok Systems International, Inc.

Forward Citations = 48

3 inventors:

Marvin C Echols (2 out of 2 patents)

David L Gruller (1 out of 3 patents)

Joe C McCaslin (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Zap-Lok Systems International, Inc.. Retrieved from https://idiyas.com/company/zap-lok-systems-international

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]