Upper sash window

Details Upper sash window Upper sash window

1977-01-10

1978-12-19

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

D2502

Patent

active

D02506041

REFERENCES:
patent: D208533 (1967-09-01), Anderson
patent: D213676 (1969-04-01), Biro
patent: D245791 (1977-09-01), Copeland
patent: 3334463 (1967-08-01), Muessel
patent: 3383801 (1968-05-01), Dallaire
patent: 3731430 (1973-05-01), Dallaire et al.

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