Building units and construction elements – Prefabricated unit – Closure
Patent
1997-07-17
1998-11-17
Clark, Doris
Building units and construction elements
Prefabricated unit
Closure
2402
Patent
active
D04013603
REFERENCES:
patent: D244459 (1977-05-01), Kratky
patent: 416885 (1889-12-01), Alexander
patent: 1176484 (1916-03-01), Otis
patent: 4630396 (1986-12-01), Zvi et al.
Confer Raymond C.
Lipniarski David J.
Clark Doris
Confer Plastics Inc.
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