Forward Citations = 134

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2 inventors (with patents filed for the assignee):

Ralph H Carmen (2 out of 16 patents)

John W Van Horn (2 out of 8 patents)

2 patents: Sort by Forward Citations

1. 5119916 - Sensor for measuring the magnetically responsive characteristics of (1992-06-09),

2. 5060777 - Low-power device for sorting tokens (1991-10-29),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#3 in Harrison, AR

#227 in Arkansas

#94,905 in US

Harrison, AR, United States of America

Duncan Industries Parking Control Corp.

Forward Citations = 134

2 inventors:

Ralph H Carmen (2 out of 16 patents)

John W Van Horn (2 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Duncan Industries Parking Control Corp.. Retrieved from https://idiyas.com/company/duncan-industries-parking-control

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]