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For the Inventor, By the Inventor

Somerset, PA, United States of America

Keystone Drill Services, Inc.


USPTO Granted Patents = 2

Trademarks = 1

Forward Citations = 14

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4 inventors (with patents filed for the assignee):

goldMedal Thomas A Walker (2 out of 4 patents)

silverMedal Stephen R Means (2 out of 2 patents)

bronzeMedal Richard Smith (1 out of 12 patents)

4.  Richard K Smith, Jr (1 out of 1 patent)


2 patents:

1. 7419017 - Multi-sectional percussive drill bit assembly (2008-09-02),
2. 7389833 - Multi-sectional percussive drill bit assembly (2008-06-24),
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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#7 in Somerset, PA

#3,422 in Pennsylvania

#94,730 in US

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

Keystone Drill Services, Inc.

Forward Citations = 14

4 inventors:

goldMedal Thomas A Walker (2 out of 4 patents)

silverMedal Stephen R Means (2 out of 2 patents)

bronzeMedal Richard Smith (1 out of 12 patents)

4.  Richard K Smith, Jr (1 out of 1 patent)

Please report any incorrect information to [email protected]
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