Building units and construction elements – Prefabricated unit – Closure
Patent
1992-05-07
1993-11-09
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03412105
REFERENCES:
patent: D2632 (1867-04-01), Lovejoy
patent: D256952 (1980-09-01), Domanski
patent: D269380 (1983-06-01), d'Avila
patent: 1554858 (1925-09-01), Kopp
patent: 1902949 (1933-03-01), Condon
patent: 2657746 (1953-11-01), Macklanburg
patent: 4577438 (1986-03-01), Santiago
patent: 4624072 (1986-11-01), Zilkha
Clark Doris
Word A. Hugo
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