Automatic ticket gate

Details Automatic ticket gate Automatic ticket gate

1980-01-04

1981-10-20

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

D20 2, D25 51, D2502, D2001

Patent

active

D02614332

REFERENCES:
patent: D198988 (1964-08-01), Hohmann
patent: D212289 (1968-09-01), Ensign
patent: D231631 (1974-05-01), Burns
patent: 2896531 (1959-07-01), Dodge et al.
patent: 2973707 (1961-03-01), Crivelli
patent: 3709145 (1973-01-01), Williamson

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