4. Registers
  5. Voting machines
  6. Recording

Richard G. Dolson

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Keyboard system and module therefor

Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent

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Magnetostrictive transducer measuring system

Measuring and testing – Liquid level or depth gauge
Patent

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Portable voting booth

Printing and office machinery – Typewriter or calculator – Calculator
Patent

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Portable voting booth

Registers – Voting machines – Recording
Patent

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Power head secondary containment leak prevention and...

Measuring and testing – With fluid pressure – Leakage
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1286737

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