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For the Inventor, By the Inventor

Houston, TX, United States of America

Dennis Tool Company


USPTO Granted Patents = 19

% Expired Patents = 10.5

Forward Citations = 1,168

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10 inventors (with patents filed for the assignee):

goldMedal Mahlon D Dennis (13 out of 46 patents)

silverMedal Thomas M Dennis (8 out of 13 patents)

bronzeMedal Eric Michael Twardowski (3 out of 18 patents)

4.  Dinesh K Agrawal (2 out of 14 patents)

5.  Rustum N Roy (2 out of 21 patents)

6.  Paul D Gigl (2 out of 2 patents)

7.  Mark Hunt (1 out of 48 patents)

8.  Jiping Cheng (1 out of 7 patents)

9.  Gordon Collier (1 out of 1 patent)

10.  Barton Hampshire (1 out of 1 patent)


19 patents:

1. 8602133 - Tool with welded cemented metal carbide inserts welded to steel and/or cemented metal carbide (2013-12-10),
2. 7712549 - Drilling tool (2010-05-11),
3. 6500226 - Method and apparatus for fabrication of cobalt alloy composite inserts (2002-12-31),
4. 6213931 - Stump grinding tooth (2001-04-10),
5. 6126895 - Process and apparatus for the preparation of particulate or solid parts (2000-10-03),
6. 6066290 - Method and apparatus for transporting green work pieces through a (2000-05-23),
7. 6063333 - Method and apparatus for fabrication of cobalt alloy composite inserts (2000-05-16),
8. 5816347 - PDC clad drill bit insert (1998-10-06),
9. 5641921 - Low temperature, low pressure, ductile, bonded cermet for enhanced (1997-06-24),
10. 5566779 - Insert for a drill bit incorporating a PDC layer having extended side (1996-10-22),
11. 5544713 - Cutting element for drill bits (1996-08-13),
12. 5524719 - Internally reinforced polycrystalling abrasive insert (1996-06-11),
13. 5499688 - PDC insert featuring side spiral wear pads (1996-03-19),
14. 5498081 - Bearing assembly incorporating shield ring precluding erosion (1996-03-12),
15. 5477034 - Method and apparatus for bonding PDC blanks (1995-12-19),
Company Overview
Dennis Tool Company, based in Houston, TX, specializes in the design and manufacture of high-quality industrial tools and equipment. The company focuses on providing innovative solutions tailored to the needs of various sectors, including construction, manufacturing, and maintenance. With a commitment to precision engineering, Dennis Tool Company leverages advanced technologies to enhance tool performance and durability, ensuring reliability for professionals in demanding environments.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

19 Patents

#282 in Houston, TX

#1,033 in Texas

#17,150 in US

#32,693 in the World

Houston, TX (US)
Houston, TX, United States of America

Dennis Tool Company

Forward Citations = 1,168

10 inventors:

goldMedal Mahlon D Dennis (13 out of 46 patents)

silverMedal Thomas M Dennis (8 out of 13 patents)

bronzeMedal Eric Michael Twardowski (3 out of 18 patents)

4.  Dinesh K Agrawal (2 out of 14 patents)

5.  Rustum N Roy (2 out of 21 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dennis Tool Company. Retrieved from https://idiyas.com/company/dennis-tool-company

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]
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