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USPTO Data Jan 1 1976 - Dec 9 2025
9 Patents
#52 in Englewood, CO
#663 in Colorado
#31,603 in US
The Pittsburg & Midway Coal Mining Co.
Forward Citations = 153
22 inventors:
Englewood, CO, United States of America
The Pittsburg & Midway Coal Mining Co.
Forward Citations = 153
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22 inventors (with patents filed for the assignee):
Raymond P Anderson (3 out of 4 patents)
David K Schmalzer (3 out of 3 patents)
Charles H Wright (3 out of 4 patents)
4. Norman L Carr (2 out of 18 patents)
5. Michael E Prudich (2 out of 2 patents)
6. William G Moon (2 out of 2 patents)
7. John V Ward (1 out of 3 patents)
8. Bruce K Schmid (1 out of 1 patent)
9. James E Junkin (1 out of 1 patent)
10. Leonard J Heavin (1 out of 1 patent)
11. Edward E King (1 out of 1 patent)
12. Dennis L Milliron (1 out of 1 patent)
13. Bruce A Bricklemyer (1 out of 1 patent)
14. Dennis C Kowalczyk (1 out of 1 patent)
15. Joseph J Svoboda (1 out of 1 patent)
9 patents:
The Pittsburg & Midway Coal Mining Co. is a leading coal mining company with a history of over 100 years. We specialize in coal extraction, processing, and distribution, serving both domestic and international markets. Our commitment to safety, environmental protection, and sustainable practices sets us apart in the industry. Visit our website to learn more about our operations and projects.
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