For the Inventor, By the Inventor

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Berlin, PA, United States of America

Center Rock Inc.

USPTO Granted Patents = 20

CIPO Patents = 22

Trademarks = 12

Forward Citations = 119

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15 inventors (with patents filed for the assignee):

Leland H Lyon (17 out of 43 patents)

Warren Thomas Lay (6 out of 16 patents)

Abram Simeon Lance (1 out of 1 patent)

4. Brandon W Fisher (1 out of 1 patent)

5. Austin C Hine (1 out of 1 patent)

6. Daniel J Reed (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 12492597 - Air rotary system for a down hole drill assembly (2025-12-09),

2. 12392202 - Down-the-hole drill hammer having a ribbed exhaust tube (2025-08-19),

3. 12291925 - Underreamer drill hammer (2025-05-06),

4. 11078736 - Flow diversion sub for a down-the-hole drill hammer (2021-08-03),

5. 10669781 - Down-the-hole drill hammer having a roller bearing assembly (2020-06-02),

6. D873316 - Non-rotating drill bit for a down-the-hole drill hammer (2020-01-21),

7. D872142 - Drill bit for a down-the-hole drill hammer (2020-01-07),

8. 10100578 - Pressure control check valve for a down-the-hole drill hammer (2018-10-16),

9. 10024103 - Down-the-hole drill hammer having a roller ramp clutch (2018-07-17),

10. 9938774 - Non-rotating drill bit for a down-the-hole drill hammer (2018-04-10),

11. 9821422 - Drill bit for a down-the-hole drill hammer having spirally arranged cutting inserts (2017-11-21),

12. 8915314 - Down-the-hole drill drive coupling (2014-12-23),

13. 8800690 - Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly (2014-08-12),

14. 8631884 - Pressure reversing valve assembly for a down-the-hole percussive drilling apparatus (2014-01-21),

15. 8622152 - Down-the-hole drill hammer having a sliding exhaust check valve (2014-01-07),

Center Rock Inc. is a leading manufacturer and distributor of drills, hammers, and other rock drilling tools for various industries including mining, construction, and oil and gas. With over 30 years of experience, Center Rock has established itself as a trusted provider of high-quality drilling equipment and exceptional customer service. Our innovative solutions and cutting-edge technology have helped numerous companies achieve their drilling objectives efficiently and safely. Visit our website to explore our wide range of products and services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

20 Patents

#1 in Berlin, PA

#594 in Pennsylvania

#15,856 in US

#30,316 in the World

Berlin, PA, United States of America

Center Rock Inc.

Forward Citations = 119

15 inventors:

Leland H Lyon (17 out of 43 patents)

Warren Thomas Lay (6 out of 16 patents)

Abram Simeon Lance (1 out of 1 patent)

4. Brandon W Fisher (1 out of 1 patent)

5. Austin C Hine (1 out of 1 patent)

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