Building units and construction elements – Prefabricated unit – Closure
Patent
1987-04-07
1990-03-06
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D25164
Patent
active
D03065014
REFERENCES:
patent: 4173247 (1979-11-01), Piana
patent: 4343340 (1982-08-01), Paule
patent: 4428218 (1984-01-01), La Rocca
patent: 4493356 (1985-01-01), Hermann et al.
Clark Doris
Word A. Hugo
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