Building units and construction elements – Structure – Having intersecting angular or curved roofs
Patent
1994-05-09
1996-05-28
Zarfas, Louis S.
Building units and construction elements
Structure
Having intersecting angular or curved roofs
D25 22, D25 29
Patent
active
D03702642
REFERENCES:
patent: D78804 (1929-06-01), Beckwith
patent: D172803 (1954-08-01), Raki
patent: D195328 (1963-06-01), Brooks
patent: D223234 (1972-04-01), Salmans
patent: D225216 (1972-11-01), King et al.
patent: D335369 (1973-05-01), Gravelle
Hannon Monica A.
Zarfas Louis S,.
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