Building units and construction elements – Structure – Simulative
Patent
1976-12-06
1978-10-17
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D25 56, D25 57, D2501
Patent
active
D02499649
REFERENCES:
patent: D26201 (1896-10-01), Turner
patent: 1930254 (1933-10-01), Simon
patent: 2551917 (1951-05-01), Whitfield
patent: 3484990 (1969-12-01), Kahn et al.
Sweet's Architectural Catalog File, 1976, Section 10.35/Air, p. 3, blade illustrations.
Malley John W.
Shin Nippon Kinzoku Co., Ltd.
Word A. Hugo
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