4. Typewriting machines
  5. Typing by other than type-face or type-die
  6. Character formation by impact

Andrei Grombchevsky

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Matrix printer and inker for indefinite length articles

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

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Matrix printer and inker for indefinite length articles

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

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Transistorized, voltage-controlled dimming circuit

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1209161

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