Building units and construction elements – Structure – Circular or oval in plan
Patent
1985-04-19
1989-07-18
Word, A. Hugo
Building units and construction elements
Structure
Circular or oval in plan
Patent
active
D03023109
REFERENCES:
patent: D214367 (1969-06-01), Mills et al.
patent: D215829 (1969-11-01), Beck
patent: 4555877 (1985-12-01), Libra
S.A.R.L. Poilane
Word A. Hugo
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