Building units and construction elements – Prefabricated unit – Closure
Patent
1990-03-13
1992-06-09
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03269140
REFERENCES:
patent: 2782758 (1957-02-01), Turner
patent: 3878645 (1975-04-01), Porter
patent: 4022263 (1977-05-01), Beckett et al.
patent: 4421058 (1983-12-01), Darl
patent: 4969292 (1990-11-01), Reid et al.
Clark Doris
Pet Mate Ltd.
Word A. Hugo
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