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For the Inventor, By the Inventor

Hoogeveen, Netherlands

Ruma Products B.v.


USPTO Granted Patents = 1


Forward Citations = 0

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4 inventors (with patents filed for the assignee):

goldMedal Evert Jonathan Van Den Ham (1 out of 4 patents)

silverMedal Walter Stam (1 out of 1 patent)

bronzeMedal Timotheus Kees Theodorus Wolterbeek (1 out of 1 patent)

4.  Erik Kerst Cornelissen (1 out of 1 patent)

5.  Walter Stam (0 patent)

6.  Roger Martin Seyger (0 patent)


1 patent:

1. 12286860 - Downhole seal and method of setting a downhole seal (2025-04-29),
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USPTO Data Jan 1 1976 - Dec 16 2025

1 Patents

#4 in Hoogeveen

#3,284 in Netherlands

...
Hoogeveen, Netherlands

Ruma Products B.v.

Forward Citations = 0

4 inventors:

goldMedal Evert Jonathan Van Den Ham (1 out of 4 patents)

silverMedal Walter Stam (1 out of 1 patent)

bronzeMedal Timotheus Kees Theodorus Wolterbeek (1 out of 1 patent)

4.  Erik Kerst Cornelissen (1 out of 1 patent)

5.  Walter Stam (0 patent)

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