Revolving door

Details Revolving door Revolving door

1986-04-30

1989-12-19

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

Patent

active

D03051528

REFERENCES:
patent: 4341165 (1982-07-01), Calandritti et al.
patent: 4640046 (1987-02-01), Rushford

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