Building units and construction elements – Prefabricated unit – Closure
Patent
1997-07-31
1998-07-21
Clark, Doris
Building units and construction elements
Prefabricated unit
Closure
2502
Patent
active
D03963004
REFERENCES:
patent: D244858 (1977-06-01), Bolender
patent: 3531577 (1970-09-01), Carlington
patent: 4098025 (1978-07-01), Stock et al.
patent: 5417029 (1995-05-01), Hugus et al.
Clark Doris
Rochester Custom Metal, Inc.
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