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Historical patents

Technological Inventions 1850 - 1899

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Shelfmark:: 40/000817

granted on:: 1890-03-20

Title:: Apparate für Fernsprechsysteme

Inventor:: Holcomb, Fred

Key:: 1890/003703

Place of publication:: Grand Rapids

Country:: United States of America

Class:: 64 - Schankgerätschaften, Flaschenverschlüsse, Spülvorrichtungen; 21 - Elektrische Apparate, Telegraphie und Telephonie

Collection:: General

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