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For the Inventor, By the Inventor

Warren, OH, United States of America

Ajax Tocco Magnethermic Corporation


USPTO Granted Patents = 31

% Expired Patents = 19.4



Trademarks = 28

Forward Citations = 60

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25 inventors (with patents filed for the assignee):

goldMedal Ronald R Akers (8 out of 8 patents)

silverMedal Anthony M Tenzek (7 out of 10 patents)

bronzeMedal David A Lazor (7 out of 10 patents)

4.  Richard McKelvey (5 out of 5 patents)

5.  Alan A Koch (3 out of 3 patents)

6.  Robert John Madeira (3 out of 3 patents)

7.  Edward Scott Jackson (3 out of 9 patents)

8.  David O Warren (3 out of 17 patents)

9.  Gary M Campbell (2 out of 2 patents)

10.  Dennis McKinney (2 out of 2 patents)

11.  Tom Illencik (2 out of 2 patents)

12.  Theodore E Burke (2 out of 3 patents)

13.  Michael Aronov (2 out of 2 patents)

14.  Michael Faber (1 out of 1 patent)

15.  Anthony Dellapenna (1 out of 1 patent)


Core Competencies:
Induction Heating
Quenching Apparatus
Crankshaft Hardening
Semi-Liquid Metal Processing
Induction Furnace
Thermal Control
Magnetic Hardening
Furnace Alignment
Superconductor Coil
Granular Materials
Austempered Ductile Iron
Thermal Expansion

31 patents:

1. 12696358 - Transverse flux induction heating device for heating flat product (2026-07-28),
2. 12338501 - Continuous intensive quenching apparatus (2025-06-24),
3. 12031189 - Continuous intensive quenching apparatus (2024-07-09),
4. 9677700 - Pipe heating apparatus and methods for uniform end heating and controlled heating length (2017-06-13),
5. 9574826 - Crucible and dual frequency control method for semi-liquid metal processing (2017-02-21),
6. 9482470 - Process and method for hot changing a VIM induction furnace (2016-11-01),
7. 9462641 - Transverse flux strip heating with DC edge saturation (2016-10-04),
8. 9133530 - High magnetic hardening assembly and method (2015-09-15),
9. 8728196 - Semi-liquid metal processing and sensing device and method of using same (2014-05-20),
10. 8642932 - System and method for crankshaft hardening (2014-02-04),
11. 8571085 - Induction furnace for the controllable melting of powder/granular materials (2013-10-29),
12. 8543178 - Superconductor induction coil (2013-09-24),
13. 8540827 - Undercut crankshaft hardening coil (2013-09-24),
14. 8502631 - Three-phase line reactor with skew yoke core design (2013-08-06),
15. 8399815 - Apparatus and method for hardening bearing surfaces of a crankshaft (2013-03-19),
Company Overview
Ajax Tocco Magnethermic Corporation is a leading provider of induction heating and melting solutions, specializing in advanced technologies for various industrial applications. The company focuses on the development and manufacturing of induction heating equipment, which is utilized in sectors such as automotive, aerospace, and metalworking. With a strong emphasis on innovation, Ajax Tocco is dedicated to enhancing efficiency and performance in thermal processing, serving clients primarily in North America and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Ajax Tocco Magnethermic Corporation USPTO Patent Assignee Logo
31 Patents

#4 in Warren, OH

#485 in Ohio

#10,936 in US

#21,284 in the World

Warren, OH (US)
Warren, OH, United States of America

Ajax Tocco Magnethermic Corporation

Forward Citations = 60

25 inventors:

goldMedal Ronald R Akers (8 out of 8 patents)

silverMedal Anthony M Tenzek (7 out of 10 patents)

bronzeMedal David A Lazor (7 out of 10 patents)

4.  Richard McKelvey (5 out of 5 patents)

5.  Alan A Koch (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ajax Tocco Magnethermic Corporation. Retrieved from https://idiyas.com/company/ajax-tocco-magnethermic

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]
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