Building units and construction elements – Structure – Having curved or vaulted roof
Patent
1994-05-09
1996-05-28
Zarfas, Louis S.
Building units and construction elements
Structure
Having curved or vaulted roof
D25 18, D25 32
Patent
active
D03702650
REFERENCES:
patent: D49879 (1916-11-01), Cove
patent: D66626 (1925-02-01), Fraser
patent: D79323 (1929-09-01), Cambern
patent: D82587 (1930-11-01), Scheibe
patent: D209191 (1967-11-01), De Sieno
patent: D311566 (1990-10-01), Ciganko
Hannon Monica A.
Zarfas Louis S,.
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