Coin operated door lock for vending machine

Sales and advertising equipment – Vending machine – Element or attachment

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Patent

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D02935929

REFERENCES:
patent: D127005 (1941-05-01), Melchert
patent: D189061 (1960-10-01), Terry
patent: D280742 (1985-09-01), Johnson
patent: 3174608 (1965-03-01), Knickerbocker
patent: 3297123 (1967-01-01), Hutchins
patent: 3905460 (1975-09-01), Greenwald et al.
patent: 3948376 (1976-04-01), Roman
patent: 4544081 (1985-10-01), Voegeli

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