BG

B. Martin Gray

📍 Page, ND: #2 of 2 inventorsTop 100%
🗺 North Dakota: #1,185 of 2,395 inventorsTop 50%
Overall (All Time): #4,040,327 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4469135 Air entrained particulate material valve — 1984-09-04