David G. Chedgy

📍 Pittsburgh, PA: #3,179 of 7,570 inventorsTop 45%

🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%

Overall (All Time): #2,273,746 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5676710	Coal preparation system	—	1997-10-14
4854941	Method and apparatus for drying fine coal	—	1989-08-08