For the Inventor, By the Inventor

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Lake Mills, WI, United States of America

Earth Tool Company LLC

USPTO Granted Patents = 66

CIPO Patents = 4

Trademarks = 18

Forward Citations = 765

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9 inventors (with patents filed for the assignee):

Steven W Wentworth (48 out of 75 patents)

Robert F Crane (43 out of 69 patents)

Mark D Randa (21 out of 36 patents)

4. Paul W Hau (6 out of 9 patents)

5. Walter George Thompson (5 out of 6 patents)

6. Jon Scharrer (2 out of 4 patents)

7. Kelvin C Aus (1 out of 5 patents)

8. Craig Lawrence Noggle (1 out of 2 patents)

9. Payce D Reynolds (1 out of 3 patents)

10. Douglas Bruce Caraway (1 out of 16 patents)

11. Anna Amalie Larsen (0 patent)

12. Bent Sloth Rasmussen (0 patent)

13. Mogens Pagter Rasmussen (0 patent)

Core Competencies:

Inversion Drum

Pipe Bursting Machine

Pneumatic Impact Tool

Directional Drilling

Rod Pulling Machine

Underground Pipe Replacement

Dynamic Steering Tool

Cable Pulling Machine

Slitting Flexible Pipe

Reamer Assembly

Quick Connect Rods

Beacon Assembly

66 patents: Sort by Forward Citations

1. 10550989 - Latch assembly for use with an inversion drum (2020-02-04),

2. 10415722 - Split ring ram adapter with cam adjustment (2019-09-17),

3. 10246949 - Slip style rod spinner for pipe bursting machine (2019-04-02),

4. 10161201 - Powered slip actuation (2018-12-25),

5. D816456 - Gut hook bladed pipe slitter (2018-05-01),

6. 9915109 - Slip style rod spinner for pipe bursting machine (2018-03-13),

7. 9611696 - Directional drill hammer pullback device (2017-04-04),

8. 9574696 - Stepped load pull back using rams (2017-02-21),

9. 9566653 - Pipe slitter (2017-02-14),

10. 9512951 - Pipe slitting apparatus (2016-12-06),

11. 9328760 - Quick connect rods (2016-05-03),

12. 9169946 - Directional drill hammer pullback device (2015-10-27),

13. 8979435 - Rod pulling and pushing machine for pipe bursting (2015-03-17),

14. 8955613 - Pneumatic impact tool (2015-02-17),

15. 8955586 - Beacon assembly (2015-02-17),

Earth Tool Company LLC is a leading manufacturer and distributor of high-quality tools and equipment for the construction and landscaping industries. We specialize in providing reliable and durable tools that are designed to withstand the toughest conditions. Our extensive product range includes excavators, wheel loaders, compactors, and various attachments. With a strong commitment to customer satisfaction, Earth Tool Company aims to support professionals in their projects by offering innovative solutions and exceptional service.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

66 Patents

#1 in Lake Mills, WI

#130 in Wisconsin

#5,286 in US

#10,709 in the World

Lake Mills, WI, United States of America

Earth Tool Company LLC

Forward Citations = 765

9 inventors:

Steven W Wentworth (48 out of 75 patents)

Robert F Crane (43 out of 69 patents)

Mark D Randa (21 out of 36 patents)

4. Paul W Hau (6 out of 9 patents)

5. Walter George Thompson (5 out of 6 patents)

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