WR

William D. Roper

PC Peabody Coal: 1 patents #9 of 33Top 30%
Overall (All Time): #4,050,770 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4380353 Dust control system and method of operation John Campbell, Daniel J. Moynihan, Earl C. Willis 1983-04-19