Trademarks = 2

Forward Citations = 343

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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),

Company Overview

Shivvers, Inc. is a specialized manufacturer based in Corydon, Iowa, focusing on advanced grain drying and storage solutions. The company is recognized for its innovative technologies that enhance the efficiency and effectiveness of grain handling processes. With a commitment to quality and reliability, Shivvers develops systems that cater to the agricultural sector, ensuring optimal preservation of harvested crops. Their expertise encompasses various aspects of grain management, contributing to improved agricultural productivity and sustainability.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

12 Patents

#1 in Corydon, IA

#159 in Iowa

#25,557 in US

#48,163 in the World

Corydon, IA, United States of America

Shivvers, Inc.

Forward Citations = 343

9 inventors:

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Shivvers, Inc.. Retrieved from https://idiyas.com/company/shivvers

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]