Air Products and Controls, Inc.

Calculating rank

USPTO Granted Patents = 3

Forward Citations = 5

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4 inventors (with patents filed for the assignee):

David L Hall (3 out of 3 patents)

Andrew D Frost (2 out of 5 patents)

James E Ludwig (1 out of 1 patent)

4. Andrew Stouffer (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. D670187 - Detector cover (2012-11-06),

2. D645372 - Detector cowling (2011-09-20),

3. 7204522 - Duct detector housing (2007-04-17),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#9 in Pontiac, MI

#2,496 in Michigan

#73,929 in US

Pontiac, MI, United States of America

Air Products and Controls, Inc.

Forward Citations = 5

4 inventors:

David L Hall (3 out of 3 patents)

Andrew D Frost (2 out of 5 patents)

James E Ludwig (1 out of 1 patent)

4. Andrew Stouffer (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Air Products and Controls, Inc.. Retrieved from https://idiyas.com/company/air-products-and-controls

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]