Building units and construction elements – Structure – Having curved or vaulted roof
Patent
1978-08-16
1980-03-25
Word, A. Hugo
Building units and construction elements
Structure
Having curved or vaulted roof
D23 2, D25 6, D25 19, D2503
Patent
active
D02545730
REFERENCES:
patent: D179824 (1957-03-01), Sturm
patent: 2495724 (1950-01-01), Horton
patent: 3219224 (1965-11-01), Anderson
patent: 3422628 (1969-01-01), McDonald
patent: 3455069 (1969-07-01), Keyes
Finkel Robert Louis
Word A. Hugo
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