FB

Frederick T. C. Bartels

SP Spectrolab: 2 patents #5 of 15Top 35%
Overall (All Time): #2,362,428 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4385430 Method of forming an energy concentrator — 1983-05-31
4301321 Two-axis focusing energy concentrator — 1981-11-17