Building units and construction elements – Prefabricated unit – Finishing unit
Patent
1976-03-15
1978-11-21
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Finishing unit
D25 17, D25 19, D25 22, D2502
Patent
active
D02503514
REFERENCES:
patent: D98523 (1936-02-01), Karlsberger
patent: D121213 (1940-06-01), Sandin et al.
patent: D210820 (1968-04-01), Knapp
patent: D221631 (1971-08-01), McAlpine
Knoblock Eugene C.
Word A. Hugo
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