Building units and construction elements – Structure – Four or more levels
Patent
1976-12-17
1978-10-03
Word, A. Hugo
Building units and construction elements
Structure
Four or more levels
D25 4, D25 6, D2503
Patent
active
D02498111
REFERENCES:
patent: D93134 (1934-08-01), Robertson
patent: D208905 (1967-10-01), Gregoire
patent: D212844 (1968-12-01), Mullen
patent: D223485 (1972-04-01), Mullen
Carson, Jr. J. Maxwell
Word A. Hugo
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