Forward Citations = 7

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2 inventors (with patents filed for the assignee):

Lyle H Rogalla (1 out of 26 patents)

Lee E Tomlinson (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4790424 - Conveying systems (1988-12-13),

2. 4686121 - Treating apparatus and method (1987-08-11),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

2 Patents

#259 in Saint Paul, MN

#2,528 in Minnesota

#94,841 in US

Saint Paul, MN, United States of America

Environmental Air Contractors, Inc.

Forward Citations = 7

2 inventors:

Lyle H Rogalla (1 out of 26 patents)

Lee E Tomlinson (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Environmental Air Contractors, Inc.. Retrieved from https://idiyas.com/company/environmental-air-contractors

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]