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For the Inventor, By the Inventor

Palo Alto, CA, United States of America

The J. R. Clarkson Company


USPTO Granted Patents = 2

Trademarks = 1

Forward Citations = 48

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1 inventor (with patents filed for the assignee):

goldMedal Curtis W Clarkson (2 out of 8 patents)


2 patents:

1. 4007911 - Packingless gate valve and actuator assemblies (1977-02-15),
2. 3945604 - Packingless gate valve and actuator assemblies (1976-03-23),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#547 in Palo Alto, CA

#20,531 in California

#92,554 in US

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Palo Alto, CA, United States of America

The J. R. Clarkson Company

Forward Citations = 48

1 inventor:

goldMedal Curtis W Clarkson (2 out of 8 patents)

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