DR

David P. Ratcliffe

FS Federal Signal: 2 patents #162 of 717Top 25%
📍 Bristolville, OH: #5 of 12 inventorsTop 45%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,247,032 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5877456 System for checking the calibration of gravimetic feeders and belt scales John C. Homer, J. Ronald Walsh 1999-03-02
5686653 System for checking the calibration of gravimetric feeders and belt scales John C. Homer, J. Ronald Walsh 1997-11-11