For the Inventor, By the Inventor

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Perry, OK, United States of America

The Charles Machine Works, Inc.

USPTO Granted Patents = 373

% Expired Patents = 6.4

CIPO Patents = 2

EPO Patents = 8

Trademarks = 49

Forward Citations = 4,412

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225 inventors (with patents filed for the assignee):

Cody L Sewell (76 out of 76 patents)

Scott Bryan Cole (44 out of 45 patents)

Greg Lowell Slaughter, Jr (32 out of 32 patents)

4. Floyd R Gunsaulis (28 out of 29 patents)

5. Michael F Gard (26 out of 44 patents)

6. Brant Douglas Kukuk (26 out of 26 patents)

7. Arthur D Deken (21 out of 21 patents)

8. Max Allen Metcalf (19 out of 19 patents)

9. Brian K Bailey (18 out of 18 patents)

10. Kelvin P Self (18 out of 19 patents)

11. Mark D Randa (14 out of 38 patents)

12. Richard Felix Sharp (14 out of 15 patents)

13. Aleksander S Wolfe (13 out of 13 patents)

14. Vernon T Stellman (13 out of 13 patents)

15. Joseph G Greenlee (13 out of 13 patents)

Core Competencies:

Directional Drilling

Pipe Slitting

Temperature Regulation

Augmented Reality

Utility Installation

Downhole Tool Tracking

Mechanical Gripper

GPS Locating

Torque Oscillation

Vacuum Tank

Beacon Optimization

Dual Rod Assembly

373 patents: Sort by Forward Citations

1. 12709861 - ATTACHMENT FRAME WITH PIVOTING LOADER ARM (2026-08-18),

2. 12669050 - Fretting-wear resistant beacon lid (2026-06-30),

3. 12662878 - Virtual brake system (2026-06-23),

4. 12644347 - Modular pipe loader assembly (2026-06-02),

5. 12643202 - Jaw engagement assist system (2026-06-02),

6. 12618289 - Apparatus for capturing axial force on an inner drive member (2026-05-05),

7. 12590531 - Tension monitor (2026-03-31),

8. 12517242 - Autonomous horizontal directional drilling ('HDD') tracking system with rover (2026-01-06),

9. 12496645 - Pipe slitter (2025-12-16),

10. 12460377 - Adjustable tracks (2025-11-04),

11. 12439493 - Dynamic temperature regulation system for a light head (2025-10-07),

12. 12435741 - Cylinder assembly for tilting a vacuum tank (2025-10-07),

13. 12410879 - Latch assembly for use with an inversion drum (2025-09-09),

14. 12404730 - Modular pipe loader assembly (2025-09-02),

15. D1089341 - Microtrencher blade (2025-08-19),

The Charles Machine Works, Inc. is a leading manufacturer of underground construction equipment, including the world-renowned brand, Ditch Witch. With over 75 years of expertise, the company continues to innovate and provide solutions for the underground utility industry. Their equipment is used for various applications such as installing and maintaining underground pipelines, telecommunications cables, and utility systems. Charles Machine Works is dedicated to delivering quality products, exceptional customer service, and ensuring the efficiency and safety of underground construction projects.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

373 Patents

#1 in Perry, OK

#5 in Oklahoma

#1,232 in US

#2,468 in the World

Perry, OK, United States of America

The Charles Machine Works, Inc.

Forward Citations = 4,412

225 inventors:

Cody L Sewell (76 out of 76 patents)

Scott Bryan Cole (44 out of 45 patents)

Greg Lowell Slaughter, Jr (32 out of 32 patents)

4. Floyd R Gunsaulis (28 out of 29 patents)

5. Michael F Gard (26 out of 44 patents)

Please report any incorrect information to [email protected]

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