David G. Chedgy

📍 Pittsburgh, PA: #54 of 319 inventorsTop 20%

🗺 Pennsylvania: #989 of 4,367 inventorsTop 25%

Overall (1997): #164,356 of 185,788Top 90%

Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5676710	Coal preparation system	—	1997-10-14