Leonard J. Heavin

TM The Pittsburg & Midway Coal Mining: 1 patents #7 of 22Top 35%

📍 Olympia, WA: #204 of 379 inventorsTop 55%

🗺 Washington: #48,111 of 76,902 inventorsTop 65%

Overall (All Time): #4,077,684 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4356078	Process for blending coal with water immiscible liquid	Edward Earl King, Dennis L. Milliron	1982-10-26