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For the Inventor, By the Inventor

Berlin, PA, United States of America

Center Rock Inc.


USPTO Granted Patents = 23

% Expired Patents = 4.3


Trademarks = 11

Forward Citations = 120

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6 inventors (with patents filed for the assignee):

goldMedal Leland H Lyon (18 out of 44 patents)

silverMedal Warren Thomas Lay (8 out of 18 patents)

bronzeMedal Austin C Hine (3 out of 3 patents)

4.  Abram Simeon Lance (1 out of 1 patent)

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

6.  Daniel J Reed (1 out of 1 patent)


23 patents:

1. 12723469 - Down-the-hole drill hammer having a piston follower valve (2026-09-01),
2. D1142543 - DRILL BIT (2026-08-18),
3. 12523102 - Down-the-hole hammer having an inverted casing (2026-01-13),
4. 12492597 - Air rotary system for a down hole drill assembly (2025-12-09),
5. 12392202 - Down-the-hole drill hammer having a ribbed exhaust tube (2025-08-19),
6. 12291925 - Underreamer drill hammer (2025-05-06),
7. 11078736 - Flow diversion sub for a down-the-hole drill hammer (2021-08-03),
8. 10669781 - Down-the-hole drill hammer having a roller bearing assembly (2020-06-02),
9. D873316 - Non-rotating drill bit for a down-the-hole drill hammer (2020-01-21),
10. D872142 - Drill bit for a down-the-hole drill hammer (2020-01-07),
11. 10100578 - Pressure control check valve for a down-the-hole drill hammer (2018-10-16),
12. 10024103 - Down-the-hole drill hammer having a roller ramp clutch (2018-07-17),
13. 9938774 - Non-rotating drill bit for a down-the-hole drill hammer (2018-04-10),
14. 9821422 - Drill bit for a down-the-hole drill hammer having spirally arranged cutting inserts (2017-11-21),
15. 8915314 - Down-the-hole drill drive coupling (2014-12-23),
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.

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USPTO Data Jan 1 1976 - Sep 15 2026

Center Rock Inc.
23 Patents

#1 in Berlin, PA

#526 in Pennsylvania

#14,382 in US

#27,577 in the World

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

Center Rock Inc.

Forward Citations = 120

6 inventors:

goldMedal Leland H Lyon (18 out of 44 patents)

silverMedal Warren Thomas Lay (8 out of 18 patents)

bronzeMedal Austin C Hine (3 out of 3 patents)

4.  Abram Simeon Lance (1 out of 1 patent)

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

Please report any incorrect information to [email protected]
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