Forward Citations = 14

Loading Chart...

5 inventors (with patents filed for the assignee):

John H Bruning (1 out of 30 patents)

Joachim Bunkenburg (1 out of 6 patents)

Gunnar D Richardson (1 out of 1 patent)

4. Robert A Smythe (1 out of 1 patent)

5. Graham J Siddell (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4790642 - Integrated metrology for microlithographic objective reducing lens (1988-12-13),

2. 4509858 - Compact, linear measurement interferometer with zero abbe error (1985-04-09),

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

2 Patents

#24 in Fairport, NY

#5,846 in New York

#94,782 in US

Fairport, NY, United States of America

Gca Corporation/tropel Division

Forward Citations = 14

5 inventors:

John H Bruning (1 out of 30 patents)

Joachim Bunkenburg (1 out of 6 patents)

Gunnar D Richardson (1 out of 1 patent)

4. Robert A Smythe (1 out of 1 patent)

5. Graham J Siddell (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gca Corporation/tropel Division. Retrieved from https://idiyas.com/company/gca-tropel-division

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]