Building units and construction elements – Structure
Patent
1986-02-24
1989-10-24
Word, A. Hugo
Building units and construction elements
Structure
D21253, D25 18, D25 21
Patent
active
D03042405
REFERENCES:
patent: 3240217 (1966-03-01), Bird et al.
patent: 3749107 (1973-07-01), Laberge
patent: 4404980 (1983-09-01), Wade
Plastics and Architecture by Arthur Quarmby, .COPYRGT.1974, p. 111, Fig. 132, Structure at top of page.
Creative Athletic Products and Services, Inc.
Word A. Hugo
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