Fred A. Helvy

Follow

Person

Lancaster, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Structure for a multiple section photomultiplier tube
- Patent number 5,336,967
- Issue date Aug 9, 1994
- Burle Technologies, Inc.
- Charles M. Tomasetti
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Multiple section photomultiplier tube
- Patent number 5,077,504
- Issue date Dec 31, 1991
- Burle Technologies, Inc.
- Fred A. Helvy
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Focusing electrode structure for photomultiplier tubes
- Patent number 4,855,642
- Issue date Aug 8, 1989
- Burle Technologies, Inc.
- Fred A. Helvy
- H01 - BASIC ELECTRIC ELEMENTS