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JOHN A HAGERSTROM
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JOHN A HAGERSTROM
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Publication of FR515675ApublicationCriticalpatent/FR515675A/fr
B41J35/12—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift
B41J35/14—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift for multicolour work; for ensuring maximum life of ink ribbon; for rendering ink-ribbon inoperative
FR515675A1919-01-021920-05-17Mécanisme pour le mouvement de monte et baisse du ruban, dans les machines à écrire à écriture visible
ExpiredFR515675A
(fr)