Building units and construction elements – Prefabricated unit – Closure
Patent
1993-04-06
1994-12-06
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03532070
REFERENCES:
patent: D326914 (1992-06-01), Kirk
patent: 3690299 (1972-09-01), Johnson
patent: 4173099 (1979-11-01), Robb
patent: 4840217 (1989-06-01), Evans, III
patent: 4969292 (1990-11-01), Reid et al.
patent: 4991350 (1991-02-01), Kirk
Clark Doris
Word A. Hugo
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