4. Typewriting machines
  5. Stenographic typewriter
  6. Electrically powered

Ralph E. Zum Bahlen

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Shorthand machine having electric platen advancement

Typewriting machines – Stenographic typewriter – Electrically powered
Patent

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Shorthand machine having electric platen advancement

Typewriting machines – Stenographic typewriter – Electrically powered
Patent

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Shorthand machine paper gauge

Typewriting machines – Stenographic typewriter
Patent

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Profile ID: LFUS-PAI-P-223600

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