% Expired Patents = 57.1

EPO Patents = 1

Forward Citations = 34

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4 inventors (with patents filed for the assignee):

David Mayfield (6 out of 8 patents)

Tad A Dickerson (1 out of 2 patents)

Timothy J Haynie (1 out of 2 patents)

4. Erik Waelchli (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 8225476 - Method and apparatus for manufacturing a catalytic converter (2012-07-24),

2. 8122602 - Sizing of mat material (2012-02-28),

3. 7900352 - Method and apparatus for manufacturing a catalytic converter (2011-03-08),

4. 7484297 - Method and apparatus for manufacturing a catalytic converter (2009-02-03),

5. 6983632 - Method and apparatus for spinning to a constant length (2006-01-10),

6. 6954988 - Method and apparatus for manufacturing a catalytic converter (2005-10-18),

7. 6357116 - Method for assembly of vehicle wheels (2002-03-19),

Company Overview

Hess Engineering, Inc. is a leading engineering firm specializing in providing innovative solutions for complex engineering projects. With a team of experienced professionals, we offer a wide range of services including structural design, project management, and construction support. Our commitment to excellence and customer satisfaction sets us apart in the industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

7 Patents

#4 in Niles, MI

#1,360 in Michigan

#39,907 in US

Niles, MI, United States of America

Hess Engineering, Inc.

Forward Citations = 34

4 inventors:

David Mayfield (6 out of 8 patents)

Tad A Dickerson (1 out of 2 patents)

Timothy J Haynie (1 out of 2 patents)

4. Erik Waelchli (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hess Engineering, Inc.. Retrieved from https://idiyas.com/company/hess-engineering

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]

1 patent (EPO):

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]