Building units and construction elements – Prefabricated unit – Closure
Design Patent
2002-05-28
2003-06-10
Clark, Doris (Department: 2914)
Building units and construction elements
Prefabricated unit
Closure
Design Patent
active
D0475796
CLAIM:
The ornamental design for a industrial dust control door, as shown and described.
REFERENCES:
patent: 4658544 (1987-04-01), McCarty
patent: 4662114 (1987-05-01), Suttles
patent: D422088 (2000-03-01), Mishina
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