For the Inventor, By the Inventor

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Cleveland, OH, United States of America

Park-Ohio Industries

USPTO Granted Patents = 51

Trademarks = 8

Forward Citations = 539

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38 inventors (with patents filed for the assignee):

John C Lewis (7 out of 7 patents)

Norbert R Balzer (6 out of 14 patents)

Paul L Day (6 out of 7 patents)

4. George M Mucha (4 out of 15 patents)

5. John F Cachat (3 out of 3 patents)

6. David R Soworowski (3 out of 3 patents)

7. James J Pusateri (3 out of 3 patents)

8. George D Pfaffmann (2 out of 34 patents)

9. Graham R Adams (2 out of 5 patents)

10. Terry M Philips (2 out of 4 patents)

11. Felix J Tarorick (2 out of 2 patents)

12. Edward F Crawford (2 out of 2 patents)

13. Shashi B Dewan (2 out of 6 patents)

14. James R Masie (2 out of 2 patents)

15. Donald E Novorsky (2 out of 2 patents)

Core Competencies:

Induction Heating

Quenching

Hardening

Workpieces

Power Inverter

Transformer Core

Heating Apparatus

Metal Billets

Control Device

Annealing

Table Assembly

Heating Mechanism

51 patents: Sort by Forward Citations

1. 6238787 - Method of attaching a strip to a rubber molded part (2001-05-29),

2. 5564345 - Stackable table, table assembly, and tray and table combination (1996-10-15),

3. D359406 - Table with removable tray and/or insert (1995-06-20),

4. 4625090 - Apparatus for inductively heat treating workpiece bore walls (1986-11-25),

5. 4619717 - Heating magnetic metal workpieces (1986-10-28),

6. 4577081 - Heating nonmagnetic metal workpieces (1986-03-18),

7. 4538041 - Rotating induction heating apparatus (1985-08-27),

8. 4537102 - Method of shearing metal billets (1985-08-27),

9. 4531987 - Method for inductively heat treating workpiece bore walls (1985-07-30),

10. 4531036 - Apparatus and method for inductively hardening small bores (1985-07-23),

11. 4511956 - Power inverter using separate starting inverter (1985-04-16),

12. 4507722 - Method and apparatus for controlling the power factor of a resonant (1985-03-26),

13. 4501942 - Method and apparatus for uniform induction heating of an elongated (1985-02-26),

14. 4482879 - Transformer core cooling arrangement (1984-11-13),

15. 4482793 - Apparatus for simultaneously heating a plurality of elongated workpieces (1984-11-13),

Company Overview

Park-Ohio Industries, headquartered in Cleveland, Ohio, specializes in advanced induction heating technology. The company focuses on the development and manufacturing of systems and equipment that enhance processes such as quenching and hardening of metal workpieces. Their expertise encompasses power inverters, transformer cores, and heating apparatuses, catering to industries that require precision in metal treatment. Park-Ohio's innovative solutions are integral to improving efficiency and performance in various manufacturing applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

51 Patents

#45 in Cleveland, OH

#304 in Ohio

#6,884 in US

#13,776 in the World

Cleveland, OH, United States of America

Park-Ohio Industries

Forward Citations = 539

38 inventors:

John C Lewis (7 out of 7 patents)

Norbert R Balzer (6 out of 14 patents)

Paul L Day (6 out of 7 patents)

4. George M Mucha (4 out of 15 patents)

5. John F Cachat (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Park-Ohio Industries. Retrieved from https://idiyas.com/company/park-ohio-industries

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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