Forward Citations = 43

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7 inventors (with patents filed for the assignee):

Douglas J Hamar (2 out of 10 patents)

Gopal Jayaraman (2 out of 3 patents)

Richard Granroth (2 out of 2 patents)

4. Robert L Whipple (2 out of 3 patents)

5. Harold A Evensen (1 out of 1 patent)

6. Edward K Hamar (1 out of 1 patent)

7. Harold A Evenson (1 out of 1 patent)

2 patents: Sort by Forward Citations

#2 in undefined, MI

#3,186 in Michigan

#94,782 in US

Portage Holding, Inc.

Forward Citations = 43

7 inventors:

Douglas J Hamar (2 out of 10 patents)

Gopal Jayaraman (2 out of 3 patents)

Richard Granroth (2 out of 2 patents)

4. Robert L Whipple (2 out of 3 patents)

5. Harold A Evensen (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Portage Holding, Inc.. Retrieved from https://idiyas.com/company/portage-holding

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]