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For the Inventor, By the Inventor

St. Louis, MO, United States of America

Arch Mineral Corporation


USPTO Granted Patents = 3

Forward Citations = 55

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2 inventors (with patents filed for the assignee):

goldMedal Larry G Offutt (3 out of 3 patents)

silverMedal David A Christopher (3 out of 4 patents)


3 patents:

1. 5810447 - Apparatus and method for continuous mining (1998-09-22),
2. 5709433 - Apparatus for continuous mining (1998-01-20),
3. 5667279 - Apparatus and method for continuous mining (1997-09-16),
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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#367 in St. Louis, MO

#994 in Missouri

#71,949 in US

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St. Louis, MO, United States of America

Arch Mineral Corporation

Forward Citations = 55

2 inventors:

goldMedal Larry G Offutt (3 out of 3 patents)

silverMedal David A Christopher (3 out of 4 patents)

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