Building units and construction elements – Structure – Having angular roof
Patent
1977-12-06
1980-01-01
Word, A. Hugo
Building units and construction elements
Structure
Having angular roof
D25 17, D25 22, D2503
Patent
active
D02538474
REFERENCES:
patent: D158373 (1950-05-01), Grossniklaus
patent: D204239 (1966-04-01), Upor
patent: D223234 (1972-04-01), Salmans
patent: 3593482 (1971-07-01), Johnson
patent: 3714749 (1973-02-01), Aitken
Facciolla Betty
Major William
Schulze Herbert C.
Word A. Hugo
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