Inventor · disambiguated record
Fred A. Helvy
Also filed as: HELVY FRED A
4 granted patents·82 citations·filing 1985–1992
78Inventor score
Technology areasH01J
Top patents by PatentIndex Score
4 records- 0177US5077504AMultiple section photomultiplier tubeBURLE TECHNOLOGIES·Filed 1990·Granted Dec 31, 1991·41 cites·6 claims
- 0277US4855642AFocusing electrode structure for photomultiplier tubesBURLE TECHNOLOGIES·Filed 1988·Granted Aug 8, 1989·24 cites·8 claims
- 0351US5336967AStructure for a multiple section photomultiplier tubeBURLE TECHNOLOGIES·Filed 1992·Granted Aug 9, 1994·10 cites·7 claims
- 0448US4680504AElectron discharge device having a narrow range spectral responseRCA CORP·Filed 1985·Granted Jul 14, 1987·7 cites·2 claims
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