For the Inventor, By the Inventor

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Warsaw, IN, United States of America

Spartech Industries, Inc.

USPTO Granted Patents = 2

Trademarks = 1

Forward Citations = 33

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5 inventors (with patents filed for the assignee):

Bruce E Harrison (2 out of 5 patents)

Robert H Owen (2 out of 11 patents)

Devlin J Barnes (2 out of 3 patents)

4. Steven R Laney (1 out of 2 patents)

5. Walter J Creutz (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5902018 - Hubcap locking device (1999-05-11),

2. 5865915 - Bi-directional anti-slip drive wheel assembly (1999-02-02),

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USPTO Data Jan 1 1976 - Dec 23 2025

2 Patents

#38 in Warsaw, IN

#1,315 in Indiana

#92,558 in US

Warsaw, IN, United States of America

Spartech Industries, Inc.

Forward Citations = 33

5 inventors:

Bruce E Harrison (2 out of 5 patents)

Robert H Owen (2 out of 11 patents)

Devlin J Barnes (2 out of 3 patents)

4. Steven R Laney (1 out of 2 patents)

5. Walter J Creutz (1 out of 1 patent)

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