RH

Robert G. Hamm

📍 Chesterfield, MO: #2,561 of 6,461 inventorsTop 40%
🗺 Missouri: #8,863 of 23,789 inventorsTop 40%
Overall (All Time): #2,369,782 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D258499 Mine roof warning indicator Larry L. Brown 1981-03-10
4217849 Mine roof warning indicator Larry L. Brown 1980-08-19