CIPO Patents = 2

Forward Citations = 119

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6 inventors (with patents filed for the assignee):

Steven W Wentworth (10 out of 76 patents)

Robert F Crane (7 out of 70 patents)

Jon A Haas (5 out of 7 patents)

4. Payce D Reynolds (2 out of 3 patents)

5. Mark D Randa (1 out of 38 patents)

6. Jon A Hass (1 out of 1 patent)

10 patents: Sort by Forward Citations

1. 5603383 - Reversible pneumatic ground piercing tool (1997-02-18),

2. 5505270 - Reversible pneumatic ground piercing tool (1996-04-09),

3. 5494116 - Pneumatic impact tool for pipe insertion (1996-02-27),

4. 5487430 - Pneumatic ground-piercing tool and body therefor (1996-01-30),

5. 5465797 - Pneumatic ground piercing tool with detachable head (1995-11-14),

6. 5440797 - Method for making a pneumatic ground piercing tool (1995-08-15),

7. 5337837 - Dual-diameter pneumatic ground piercing tool (1994-08-16),

8. 5317953 - Neutral-centering valve control system (1994-06-07),

9. 5199151 - Method for making a pneumatic ground piercing tool (1993-04-06),

10. 5025868 - Pneumatic ground piercing tool (1991-06-25),

Company Overview

Earth Tool Corporation, based in Oconomowoc, Wisconsin, specializes in the development and manufacturing of advanced trenchless technology solutions. The company focuses on creating innovative tools and equipment that enhance the efficiency of underground construction and utility installation. With a commitment to quality and performance, Earth Tool serves a diverse range of industries, providing reliable products that facilitate the installation of pipelines and other underground infrastructure while minimizing surface disruption.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

10 Patents

#6 in Oconomowoc, WI

#668 in Wisconsin

#29,866 in US

#56,047 in the World

Oconomowoc, WI, United States of America

Earth Tool Corporation

Forward Citations = 119

6 inventors:

Steven W Wentworth (10 out of 76 patents)

Robert F Crane (7 out of 70 patents)

Jon A Haas (5 out of 7 patents)

4. Payce D Reynolds (2 out of 3 patents)

5. Mark D Randa (1 out of 38 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Earth Tool Corporation. Retrieved from https://idiyas.com/company/earth-tool

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]

2 patents (CIPO):

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]