JB

John L. Butler

IA Image Acoustics: 22 patents #1 of 5Top 20%
RTX (Raytheon): 2 patents #5,307 of 15,912Top 35%
HA Hazeltine: 1 patents #38 of 95Top 40%
📍 Marshfield, MA: #7 of 127 inventorsTop 6%
🗺 Massachusetts: #3,693 of 88,656 inventorsTop 5%
Overall (All Time): #143,526 of 4,157,543Top 4%
27
Patents All Time

Issued Patents All Time

Showing 26–27 of 27 patents

Patent #TitleCo-InventorsDate
4332986 Speaker system employing passive radiator — 1982-06-01
4326275 Directional transducer — 1982-04-20