Building units and construction elements – Structure – Simulative
Patent
1977-06-13
1980-01-08
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D25 80, D2501
Patent
active
D02539110
REFERENCES:
patent: 1804753 (1931-05-01), Douglas
Sweet's Architectural Catalog File, 1977, Section 9.1/Una, p. 8, "Butte" panel illustration.
Akerson David W.
Hendrickson Miner H.
Conwed Corporation
Lucas William D.
Word A. Hugo
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