Security door guard

Details Security door guard Security door guard

1984-07-09

1987-02-17

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

D25 87

Patent

active

D02883678

REFERENCES:
patent: 3683555 (1972-08-01), Kuniansky
patent: 4484410 (1984-11-01), English

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