JS

John F. Siebenand

SP Sperry: 1 patents #355 of 841Top 45%
📍 Eagan, MN: #561 of 891 inventorsTop 65%
🗺 Minnesota: #32,449 of 52,454 inventorsTop 65%
Overall (All Time): #4,023,993 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4550425 Speech sampling and companding device David P. Andersen, Raymond C. Hedin 1985-10-29