Lamoni, IA, United States of America

Donald H Parkes

This inventor holds 7 USPTO granted patents. Top assignees: Shivvers, Inc., Shivvers Group, Inc., Other. Active years: 1986-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Donald H Parkes. Retrieved from https://idiyas.com/inventor/donald-h-parkes

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

Average Co-Inventor Count = 1.6

ph-index = 6

Forward Citations = 198(Granted Patents)


Company Filing History:

goldMedal6 out of 12 
 
Shivvers, Inc.
 patents
silverMedal1 out of 9 
 
Shivvers Group, Inc.
 patents
bronzeMedal1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1986-1998

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7 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Donald H Parkes

Introduction

Donald H Parkes is a notable inventor based in Lamoni, Iowa, with a remarkable portfolio of seven patents. His work primarily focuses on enhancing vehicle performance and improving lawn care equipment efficiency. Parkes has made significant strides in the field of mechanical engineering through his innovative designs and systems.

Latest Patents

Among his latest inventions is the "Variable Force Traction Enhance Systems," which provides a solution for vehicles by utilizing hydraulic cylinders connected to hydrostatic transmissions. This system allows for the automatic adjustment of weight distribution to improve traction and prevent rear-end bucking. Another notable patent is the "Lawn Mower Clipping Collection System," designed for riding mowers. This system features a collector housing with a cylindrical separation chamber that efficiently collects mower clippings while minimizing operator effort.

Career Highlights

Throughout his career, Parkes has worked with companies such as Shivvers, Inc. and Shivvers Group, Inc. His experience in these organizations has contributed to his development as an inventor and has allowed him to refine his innovative ideas.

Collaborations

Parkes has collaborated with talented individuals in his field, including Steven D Shivvers and Scott A Schick. These partnerships have likely fostered a creative environment that encourages the exchange of ideas and advancements in technology.

Conclusion

Donald H Parkes exemplifies the spirit of innovation through his patents and contributions to vehicle and lawn care technology. His work continues to impact the industry positively, showcasing the importance of inventive thinking in solving practical problems.

Profile summary based on public USPTO records.
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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