Building units and construction elements – Prefabricated unit – Closure
Patent
1990-08-22
1993-03-09
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D14107, D20 2
Patent
active
D03338746
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patent: D222471 (1971-10-01), Shebanow et al.
patent: D234270 (1975-02-01), Frick
patent: D275797 (1984-10-01), Nishida
patent: D289099 (1987-03-01), Golland
patent: D292939 (1987-11-01), Aubrey
patent: D293792 (1988-01-01), Watson
patent: D294146 (1988-02-01), Duke
patent: 2144718 (1939-01-01), Gersbach
patent: 2618085 (1952-11-01), Gerbach
patent: 3445962 (1969-05-01), Byland et al.
Burmeister Marshall
Clark Doris
General Signal Corporation
Smiley Raymond E.
Word A. Hugo
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