RC

Ray E. Canfield

DC Donaldson Company: 1 patents #454 of 695Top 70%
📍 Grinnell, IA: #18 of 30 inventorsTop 60%
🗺 Iowa: #8,735 of 15,303 inventorsTop 60%
Overall (All Time): #4,090,575 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4270689 Method of forming a tube structure for use in a lap joint — 1981-06-02