SB

Simon Bonorand

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Zuoz, CH: #2 of 2 inventorsTop 100%
Overall (All Time): #4,107,642 of 4,157,543Top 100%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4192085 Teaching aid device for teaching the basic principles of arithmetic — 1980-03-11