Combined window and window frame

Building units and construction elements – Prefabricated unit – Closure

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2502

Patent

active

D04041429

REFERENCES:
patent: D213676 (1969-04-01), Biro
patent: 2556407 (1951-06-01), Wilke
patent: 2568130 (1951-09-01), Olson
patent: 2705350 (1955-04-01), West et al.
patent: 2747241 (1956-05-01), Marousky
patent: 2780328 (1957-02-01), Yoder

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