For the Inventor, By the Inventor

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Boulder, CO, United States of America

Proto Production Plastics, Inc.

USPTO Granted Patents = 3

Forward Citations = 58

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4 inventors (with patents filed for the assignee):

Kenneth W Hotchkiss (3 out of 11 patents)

John A Popken (1 out of 7 patents)

George A Kopp, Sr (1 out of 1 patent)

4. Nellie S Griffith (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4449015 - Connector cover with multiple mounting means (1984-05-15),

2. 4104703 - Terminal block cover for covering block and space between adjacent blocks (1978-08-01),

3. 3966074 - Terminal box and cover (1976-06-29),

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#285 in Boulder, CO

#1,717 in Colorado

#72,030 in US

Boulder, CO, United States of America

Proto Production Plastics, Inc.

Forward Citations = 58

4 inventors:

Kenneth W Hotchkiss (3 out of 11 patents)

John A Popken (1 out of 7 patents)

George A Kopp, Sr (1 out of 1 patent)

4. Nellie S Griffith (1 out of 1 patent)

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