EPO Patents = 3

Forward Citations = 0

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4 inventors (with patents filed for the assignee):

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

Walter Stam (1 out of 1 patent)

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: Sort by Forward Citations

#4 in Hoogeveen

#3,348 in Netherlands

Ruma Products B.v.

Forward Citations = 0

4 inventors:

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

Walter Stam (1 out of 1 patent)

Timotheus Kees Theodorus Wolterbeek (1 out of 1 patent)

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

5. Walter Stam (0 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ruma Products B.v.. Retrieved from https://idiyas.com/company/ruma-products-b-v

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

3 patents (EPO):

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]