RB

Robert Michael Birch

CS Commercial Shearing: 1 patents #1 of 8Top 15%
📍 Seattle, WA: #62 of 333 inventorsTop 20%
🗺 Washington: #241 of 1,406 inventorsTop 20%
Overall (1989): #64,564 of 140,708Top 50%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4830536 Method and apparatus for tunnel lining Warren E. Brown 1989-05-16