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For the Inventor, By the Inventor

Naugatuck, WV, United States of America

Marrowbone Development Company


USPTO Granted Patents = 2

Forward Citations = 43

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2 inventors (with patents filed for the assignee):

goldMedal George W Graham (2 out of 4 patents)

silverMedal Chung F Liao (1 out of 4 patents)


2 patents:

1. 5064022 - Ladder apparatus and method for large mobile equipment (1991-11-12),
2. 5039315 - Method and apparatus for separating particulates from a gas stream (1991-08-13),
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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#1 in Naugatuck, WV

#536 in West Virginia

#92,633 in US

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Naugatuck, WV, United States of America

Marrowbone Development Company

Forward Citations = 43

2 inventors:

goldMedal George W Graham (2 out of 4 patents)

silverMedal Chung F Liao (1 out of 4 patents)

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