4. Printing and office machinery
  5. Typewriter or calculator
  6. Element or attachment

Frank A. Ellis

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Ink ribbon cartridge

Printing and office machinery – Typewriter or calculator – Element or attachment
Patent

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Printer and cartridge assembly therefor

Typewriting machines – Including interposed inking device for record-medium – Endless ribbon or cartridge therefor
Patent

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Printer and cartridge assembly therefor

Typewriting machines – Sheet or web – For feeding plural record media concurrently or selectively
Patent

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Profile ID: LFUS-PAI-P-717810

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