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For the Inventor, By the Inventor

Adrian, MI, United States of America

Roto Plastics, Inc.


USPTO Granted Patents = 2

Forward Citations = 22

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1 inventor (with patents filed for the assignee):

goldMedal David C Mulligan (2 out of 5 patents)


2 patents:

1. 6409954 - Method of making a rotary molded plastic member with variable wall thickness (2002-06-25),
2. 4891085 - Method of making an automobile roof cap (1990-01-02),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#16 in Adrian, MI

#3,122 in Michigan

#92,586 in US

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Adrian, MI, United States of America

Roto Plastics, Inc.

Forward Citations = 22

1 inventor:

goldMedal David C Mulligan (2 out of 5 patents)

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