Building units and construction elements – Structure – Having curved or vaulted roof
Patent
1982-04-08
1984-09-18
Word, A. Hugo
Building units and construction elements
Structure
Having curved or vaulted roof
Patent
active
D02756102
REFERENCES:
patent: D138447 (1944-08-01), Van Scoy et al.
patent: D152968 (1949-03-01), Hawlett
patent: 3766691 (1973-10-01), Ray
Domi-Cyl, Inc.
Word A. Hugo
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