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For the Inventor, By the Inventor

Warrendale, PA, United States of America

Joy Global Underground Mining LLC


USPTO Granted Patents = 145

% Expired Patents = 9.0



Trademarks = 14

Forward Citations = 199

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137 inventors (with patents filed for the assignee):

goldMedal Christopher George Stewart (12 out of 16 patents)

silverMedal Peter A Lugg (11 out of 13 patents)

bronzeMedal Geoffrey W Keech (11 out of 12 patents)

4.  Nagy Daher (10 out of 10 patents)

5.  Aaron Philip Walker (10 out of 10 patents)

6.  Edward F Niederriter (9 out of 20 patents)

7.  Gareth Rimmington (9 out of 16 patents)

8.  Joaquim Antonio Soares De Sousa (8 out of 8 patents)

9.  Peter Hanna (7 out of 7 patents)

10.  Michael L O'Neill (7 out of 33 patents)

11.  Richard Boyd (6 out of 9 patents)

12.  Stuart Reeves (6 out of 6 patents)

13.  Bradley M Neilson (6 out of 7 patents)

14.  Charles W Watson (6 out of 7 patents)

15.  Ryan E Perry (6 out of 7 patents)


Core Competencies:
Conveyor Chain
Cutting Device
Automated Control
Drilling Tool
Bolting Device
Cutter Head
Longwall Mining
Mining Machine
Sensor Systems
Impact Detection
Rock Cutting
Support Systems

145 patents:

1. 12709982 - SYSTEM AND METHOD FOR CONTROLLING ROOF SUPPORT (2026-08-18),
2. 12709981 - DRILLING AND BOLTING TOOL (2026-08-18),
3. 12691743 - Energy storage system for vehicle and alignment system for same (2026-07-28),
4. 12668113 - Energy storage system for vehicle and mounting system for same (2026-06-30),
5. 12662939 - Guide shoe for mining machine (2026-06-23),
6. 12644385 - Bolter (2026-06-02),
7. 12643743 - Shaft support for industrial machine (2026-06-02),
8. 12589945 - Resilient link for conveyor chain (2026-03-31),
9. 12584409 - Rackbar rotation limit (2026-03-24),
10. 12553791 - Offboard monitoring system (2026-02-17),
11. 12546168 - Support for drilling and bolting tool (2026-02-10),
12. 12540548 - Cutting device and support for same (2026-02-03),
13. 12472770 - Coupling between a steerable wheel and a housing in a vehicle wheel unit (2025-11-18),
14. 12391484 - Systems and methods for automated control of a beam stageloader bootend (2025-08-19),
15. 12391483 - Systems and methods for automated control of a beam stageloader bootend (2025-08-19),
Joy Global Underground Mining LLC, based in Warrendale, PA, specializes in the development and manufacturing of advanced mining machinery. The company focuses on innovative technologies such as conveyor chains, cutting devices, automated control systems, drilling tools, and bolting devices. With expertise in longwall mining and mining machines, Joy Global plays a crucial role in enhancing operational efficiency and safety in underground mining operations, catering to a global market with its cutting-edge solutions.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

145 Patents

#1 in Warrendale, PA

#112 in Pennsylvania

#2,696 in US

#5,608 in the World

Warrendale, PA (US)
Warrendale, PA, United States of America

Joy Global Underground Mining LLC

Forward Citations = 199

137 inventors:

goldMedal Christopher George Stewart (12 out of 16 patents)

silverMedal Peter A Lugg (11 out of 13 patents)

bronzeMedal Geoffrey W Keech (11 out of 12 patents)

4.  Nagy Daher (10 out of 10 patents)

5.  Aaron Philip Walker (10 out of 10 patents)

Please report any incorrect information to [email protected]
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