Building units and construction elements – Prefabricated unit – Closure
Patent
1977-06-23
1979-03-20
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D25 48, D2502
Patent
active
D02513897
REFERENCES:
patent: D217597 (1970-05-01), Johnston
patent: D237380 (1975-10-01), Bice
patent: 3599703 (1971-08-01), Mennuto
Sweet's Architectural Catalog File, 1976, Section 8.2/Ss, p. 5, Item D28.
Engmans, Inc.
Word A. Hugo
Zarley Donald H.
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