BS

Barry A. Spencer

RI Robbins Industries: 3 patents #9 of 50Top 20%
Overall (All Time): #1,306,680 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4583731 Spinal exercising apparatus James P. Crivello 1986-04-22
RE31511 Rotary cutterhead for an earth boring machine 1984-01-31
4234235 Rotary cutterhead for an earth boring machine Richard J. Robbins 1980-11-18
4193637 Rotary cutterhead for an earth boring machine 1980-03-18