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Trademarks = 2

Forward Citations = 323

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9 inventors (with patents filed for the assignee):

Donald H Parkes (6 out of 7 patents)

Steven D Shivvers (5 out of 6 patents)

Scott A Schick (3 out of 9 patents)

4. Charles C Shivvers (3 out of 8 patents)

5. Edward A Ryks (3 out of 3 patents)

6. Richard A Arnold (3 out of 3 patents)

7. Douglas F McFarland (2 out of 14 patents)

8. Steve D Shivvers (1 out of 3 patents)

9. Xinzhan Yang (1 out of 1 patent)

12 patents: Sort by Forward Citations

1. 6923389 - Uniform grain spreader (2005-08-02),

2. 5816035 - Mower deck mounting system (1998-10-06),

3. 5784867 - Variable force traction enhance systems (1998-07-28),

4. 5778648 - Lawn mower clipping collection system (1998-07-14),

5. 5669841 - Twisted belt tensioner (1997-09-23),

6. 5279376 - Force neutralizing mechanism for a single lever control (1994-01-18),

7. 5131483 - Single lever control (1992-07-21),

8. 4896506 - Transmission with integrated gear reduction (1990-01-30),

9. 4845949 - Parking brake for integrated transmission (1989-07-11),

10. 4843817 - Integrated hydraulic transmission (1989-07-04),

11. 4750273 - Computer controlled grain drying (1988-06-14),

12. 4599809 - Grain dryer system (1986-07-15),

Shivvers, Inc. is a leading manufacturer of grain drying systems for agriculture. With over 50 years of experience, Shivvers is known for its innovative solutions that help farmers around the world increase efficiency and maximize crop yield. The company's products are designed to provide reliable and cost-effective drying solutions for various types of grains, including corn, soybeans, and wheat.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

12 Patents

#1 in Corydon, IA

#152 in Iowa

#24,782 in US

#46,701 in the World

Corydon, IA, United States of America

Shivvers, Inc.