For the Inventor, By the Inventor

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Youngstown, OH, United States of America

Commercial Shearing, Inc.

USPTO Granted Patents = 42

Trademarks = 1

Forward Citations = 376

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29 inventors (with patents filed for the assignee):

John D Petro (8 out of 9 patents)

Robert F Hodgson (6 out of 6 patents)

Arthur J Williams (4 out of 4 patents)

4. Lambert Haner (2 out of 20 patents)

5. David W Francis (2 out of 3 patents)

6. David L Mauch (2 out of 2 patents)

7. Carl M Singer (2 out of 2 patents)

8. John D Turko (2 out of 2 patents)

9. Nicholas Chlumecky (2 out of 2 patents)

10. Arthur Williams (2 out of 2 patents)

11. Ingo Friedrichs (1 out of 1 patent)

12. James Otto Byers, Jr (1 out of 1 patent)

13. Ingvald O Juvrud (1 out of 1 patent)

14. Ronald K Getman (1 out of 1 patent)

15. Edward J Ratkay (1 out of 1 patent)

Core Competencies:

Hydrostatic Drive Systems

Tunnel Lining

Stepper Motor Control

Fluid Valve Structures

Axial Piston Pumps

Hydraulic Valves

Pressure Compensated Control

Rotary Impeller Pumps

Cribbing Techniques

Servo Amplifiers

Gear Pump Lubrication

Remote Valve Operators

42 patents: Sort by Forward Citations

1. 4879501 - Constant speed hydrostatic drive system (1989-11-07),

2. 4839935 - Mini arched bridge (1989-06-20),

3. 4835359 - Method of manufacturing hemispherical tank heads (1989-05-30),

4. 4830536 - Method and apparatus for tunnel lining (1989-05-16),

5. 4825752 - End-of-stroke bypass valve in piston for impact relief in hydraulic tilt (1989-05-02),

6. 4803415 - Stepper motor control circuit and apparatus (1989-02-07),

7. 4789002 - Fluid valve structures (1988-12-06),

8. 4777981 - Magnetic detent joy stick and stack remote control valves (1988-10-18),

9. 4744288 - Axial piston pumps and motors (1988-05-17),

10. 4709724 - Fluid valve structures (1987-12-01),

11. 4682939 - Gear pump or motor with tooth tips of dissimilar metal (1987-07-28),

12. 4636155 - Hydraulic seal having U-shaped gasket and a plurality of plastically (1987-01-13),

13. 4585024 - Air shift conversion apparatus for manual valves (1986-04-29),

14. 4569372 - Remote valve operators (1986-02-11),

15. 4569367 - Hydraulic valve inlet unloaders (1986-02-11),

Commercial Shearing, Inc. is a leading manufacturer and provider of hydraulic cylinders, rotary actuators, and custom hydraulic components. With over 40 years of experience, we offer high-quality products and reliable solutions to various industries including construction, agriculture, and material handling. Our state-of-the-art manufacturing facilities and skilled team ensure precision and durability in every product we produce. Visit our website to learn more about our extensive product range and how we can assist you in meeting your hydraulic system needs.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

42 Patents

#1 in Youngstown, OH

#334 in Ohio

#7,984 in US

#15,868 in the World

Youngstown, OH, United States of America

Commercial Shearing, Inc.

Forward Citations = 376

29 inventors:

John D Petro (8 out of 9 patents)

Robert F Hodgson (6 out of 6 patents)

Arthur J Williams (4 out of 4 patents)

4. Lambert Haner (2 out of 20 patents)

5. David W Francis (2 out of 3 patents)

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