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For the Inventor, By the Inventor

Lake Mills, WI, United States of America

Earth Tool Company LLC


USPTO Granted Patents = 67


Trademarks = 18

Forward Citations = 814

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10 inventors (with patents filed for the assignee):

goldMedal Steven W Wentworth (49 out of 75 patents)

silverMedal Robert F Crane (44 out of 69 patents)

bronzeMedal Mark D Randa (22 out of 37 patents)

4.  Paul W Hau (6 out of 9 patents)

5.  Walter George Thompson (5 out of 7 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)


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

67 patents:

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.

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USPTO Data Jan 1 1976 - Jan 6 2026

67 Patents

#1 in Lake Mills, WI

#128 in Wisconsin

#5,277 in US

#10,750 in the World

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Lake Mills, WI, United States of America

Earth Tool Company LLC

Forward Citations = 814

10 inventors:

goldMedal Steven W Wentworth (49 out of 75 patents)

silverMedal Robert F Crane (44 out of 69 patents)

bronzeMedal Mark D Randa (22 out of 37 patents)

4.  Paul W Hau (6 out of 9 patents)

5.  Walter George Thompson (5 out of 7 patents)

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