Building units and construction elements – Prefabricated unit – Closure
Patent
1975-07-02
1977-10-18
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D2502
Patent
active
D02461161
REFERENCES:
patent: 1352656 (1920-09-01), Cahill
patent: 3092170 (1963-06-01), Ellis
patent: 3570579 (1971-03-01), Matsushima
Netherlands Application: 6408875, H. Douglas, 2/1966.
Casella Anthony J.
Word A. Hugo
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