% Expired Patents = 100.0

Forward Citations = 347

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3 inventors (with patents filed for the assignee):

David Crosby (1 out of 10 patents)

David Hayes (1 out of 3 patents)

Philip Andrew Greenhalgh (1 out of 1 patent)

1 patent: Sort by Forward Citations

#1 in Wallingford

#9,890 in United Kingdom

Cerr Limited

Forward Citations = 347

3 inventors:

David Crosby (1 out of 10 patents)

David Hayes (1 out of 3 patents)

Philip Andrew Greenhalgh (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Cerr Limited. Retrieved from https://idiyas.com/company/cerr

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]