% Expired Patents = 75.0

Trademarks = 2

Forward Citations = 13

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15 inventors (with patents filed for the assignee):

James Edward Pinkley (3 out of 5 patents)

Roy Carlton Jones (2 out of 6 patents)

Phillip Edwin Gramlich, Jr (2 out of 3 patents)

4. Steven J Thorogood (2 out of 2 patents)

5. Billy J Brown (2 out of 2 patents)

6. Brian Peter Masloff (2 out of 5 patents)

7. John Charles Fodor (2 out of 3 patents)

8. Jeffrey Thomas Gotro (1 out of 2 patents)

9. George Pesansky (1 out of 1 patent)

10. William G Fox (1 out of 9 patents)

11. Matthew S Slatter (1 out of 4 patents)

12. Roland C Walker (1 out of 3 patents)

13. James D Cook (1 out of 40 patents)

14. John M Sheeler (1 out of 1 patent)

15. Ed Rollandini (1 out of 1 patent)

8 patents: Sort by Forward Citations

1. 9120614 - Method for preserving the firmness and internal pressure of a resin cartridge and improving the shelf-life of a resin cartridge (2015-09-01),

2. 8883868 - Rock dusting compositions and methods of use thereof (2014-11-11),

3. 8801337 - Method of using a dome headed roof bolt (2014-08-12),

4. 8584974 - Rock dusting apparatus (2013-11-19),

5. 8550751 - Non-tensionable cable bolt apparatus and related method (2013-10-08),

6. 8539992 - Apparatus and method for anchor bolt grouting (2013-09-24),

7. 8523494 - Expansion shell assembly (2013-09-03),

8. D653680 - Cable pusher (2012-02-07),

Company Overview

DSI Underground Systems, Inc. is a leading manufacturer and supplier of ground support products and systems for the mining and tunneling industries. With over 40 years of experience, DSI offers innovative solutions to enhance safety and productivity in underground operations. Their range of products includes rock bolts, injection resins, mesh and shotcrete systems, as well as engineering services and training programs.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

8 Patents

#1 in Martinsburg, VA

#40 in Virginia

#35,893 in US

Martinsburg, VA, United States of America

Dsi Underground Systems, Inc.

Forward Citations = 13

15 inventors:

James Edward Pinkley (3 out of 5 patents)

Roy Carlton Jones (2 out of 6 patents)

Phillip Edwin Gramlich, Jr (2 out of 3 patents)

4. Steven J Thorogood (2 out of 2 patents)

5. Billy J Brown (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dsi Underground Systems, Inc.. Retrieved from https://idiyas.com/company/dsi-underground-systems

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]