Building units and construction elements – Prefabricated unit – Closure
Patent
1994-11-25
1996-01-09
Clark, Doris
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03661199
REFERENCES:
patent: D354572 (1995-01-01), Headrick
patent: 2794219 (1957-06-01), MacHanburg
patent: 3273287 (1966-09-01), Pease, Jr.
patent: 3374579 (1968-03-01), Neff
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