DB

Donald B. Butterfield

A. A.I.L.: 1 patents #11 of 21Top 55%
📍 Longmeadow, MA: #131 of 208 inventorsTop 65%
🗺 Massachusetts: #56,664 of 88,656 inventorsTop 65%
Overall (All Time): #3,879,287 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5026462 Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles Alcide Sgarzi 1991-06-25