FH

Fred A. Helvy

BT Burle Technologies: 3 patents #4 of 54Top 8%
RC Rca: 1 patents #895 of 1,739Top 55%
Overall (All Time): #1,294,857 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5336967 Structure for a multiple section photomultiplier tube Charles M. Tomasetti, Donald B. Kaiser 1994-08-09
5077504 Multiple section photomultiplier tube 1991-12-31
4855642 Focusing electrode structure for photomultiplier tubes Gilbert N. Butterwick 1989-08-08
4680504 Electron discharge device having a narrow range spectral response Arthur F. McDonie 1987-07-14