For the Inventor, By the Inventor

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Canton, OH, United States of America

Aspro, Incorporated

USPTO Granted Patents = 33

Trademarks = 1

Forward Citations = 409

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14 inventors (with patents filed for the assignee):

Derald H Kraft (10 out of 20 patents)

Richard C St John (9 out of 18 patents)

Nolte V Sproul (4 out of 8 patents)

4. William C Eddy (3 out of 3 patents)

5. Albert F Myers, Sr (2 out of 2 patents)

6. Walter L Dissett (1 out of 17 patents)

7. Gary Bernard Schumacher (1 out of 2 patents)

8. Carmeli Adahan (1 out of 3 patents)

9. Michael F Kark (1 out of 1 patent)

10. John D Danko (1 out of 1 patent)

11. Thomas A Devlin (1 out of 1 patent)

12. Jeffrey D Marsh (1 out of 1 patent)

13. Larry L Stoner (1 out of 1 patent)

14. Gary B Schumacher (1 out of 1 patent)

33 patents: Sort by Forward Citations

1. 4282962 - Pivotal mounting assembly (1981-08-11),

2. 4254541 - Method of making clutch housing and pulley assembly (1981-03-10),

3. 4226320 - Centrifugal clutch construction (1980-10-07),

4. 4192412 - Centrifugal clutch with shoe stops (1980-03-11),

5. 4156547 - Speed-responsive anti-skid and anti-spin system for vehicles (1979-05-29),

6. 4141430 - Speed-responsive tag axle control system (1979-02-27),

7. 4109542 - Spun V-grooved sheet metal pulley with thick hub wall integral with thin (1978-08-29),

8. 4090284 - Method of making a sintered pulley hub construction (1978-05-23),

9. 4066300 - Digital traction control system (1978-01-03),

10. 4062433 - Quick release centrifugal clutch construction (1977-12-13),

11. 4059023 - One-piece sintered pulley hub construction (1977-11-22),

12. 4056291 - Clutch housing and bearing assembly and method of making the same (1977-11-01),

13. 4056014 - Sintered pulley hub construction and method of making same (1977-11-01),

14. 4055976 - Method of roller spinning cup-shaped metal blanks and roller (1977-11-01),

15. 4050321 - Multi V-grooved pulley structure and method of making same (1977-09-27),

Aspro, Incorporated is a leading software development company specializing in creating innovative solutions for businesses. With a team of talented developers and cutting-edge technologies, we deliver tailor-made software products that optimize efficiency and productivity. Our expertise ranges from mobile and web applications to enterprise solutions and data analytics. Aspro, Inc. is committed to providing exceptional software solutions that empower businesses to stay ahead in today's competitive market.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Aspro, Incorporated

33 Patents

#6 in Canton, OH

#451 in Ohio

#10,288 in US

#20,112 in the World

Canton, OH, United States of America

Aspro, Incorporated

Forward Citations = 409

14 inventors:

Derald H Kraft (10 out of 20 patents)

Richard C St John (9 out of 18 patents)

Nolte V Sproul (4 out of 8 patents)

4. William C Eddy (3 out of 3 patents)

5. Albert F Myers, Sr (2 out of 2 patents)

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