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David M. Walker
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Westford, MA, US
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last 30 patents
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Patent Grant
Impedance matched and thermally cooled deflection amplifiers for ch...
Patent number
4,667,108
Issue date
May 19, 1987
Control Data Corporation
David M. Walker
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Method and apparatus for in-situ plasma cleaning of electron beam o...
Patent number
4,665,315
Issue date
May 12, 1987
Control Data Corporation
Lawrence F. Bacchetti
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Low defect etching of patterns using plasma-stencil mask
Patent number
4,661,203
Issue date
Apr 28, 1987
Control Data Corporation
Donald O. Smith
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Patent Grant
Modular all-electrostatic electron-optical column and assembly of s...
Patent number
4,661,709
Issue date
Apr 28, 1987
Control Data Corporation
David M. Walker
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Electron beam array alignment means
Patent number
4,419,580
Issue date
Dec 6, 1983
Control Data Corporation
David M. Walker
H01 - BASIC ELECTRIC ELEMENTS