Donald H. Preist

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San Mateo, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Density modulated electron beam tube with enhanced gain
- Patent number 4,527,091
- Issue date Jul 2, 1985
- Varian Associates, Inc.
- Donald H. Preist
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gridded electron power tube
- Patent number 4,480,210
- Issue date Oct 30, 1984
- Varian Associates, Inc.
- Donald H. Preist
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Modular electron discharge device
- Patent number 4,011,481
- Issue date Mar 8, 1977
- Varian Associates
- Donald H. Preist
- H01 - BASIC ELECTRIC ELEMENTS