Double hung window

Details Double hung window Double hung window

1986-05-07

1989-01-24

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

Patent

active

D02995441

REFERENCES:
patent: D213676 (1969-04-01), Biro
patent: D268996 (1983-05-01), Elleby, Jr. et al.
patent: 478593 (1892-07-01), Gregg
patent: 988944 (1911-07-01), Aufderheide
patent: 2304598 (1942-12-01), Plym
patent: 2611934 (1952-09-01), Milone
patent: 2775798 (1957-01-01), Bent
patent: 2909813 (1959-10-01), Wilson
patent: 4215517 (1980-08-01), Everson
patent: 4483099 (1984-11-01), Schmidt

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