4. Printing
  5. Selective or progressive
  6. Bed and platen machines

Donald G. Hebert

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Dot matrix print head assembly

Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent

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High-speed wire print head with wire print position shift appara

Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent

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Matrix print head assembly

Printing – Selective or progressive – Bed and platen machines
Patent

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Matrix print head assembly

Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent

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Matrix print head with improved armature retainer

Textiles: fiber preparation
Patent

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