Building units and construction elements – Structure – Four or more levels
Patent
1987-09-21
1990-08-07
Word, A. Hugo
Building units and construction elements
Structure
Four or more levels
D25 23
Patent
active
D03097820
REFERENCES:
patent: D76491 (1928-10-01), Merrill
patent: D197215 (1963-12-01), Dreyfuss
patent: D288611 (1987-03-01), Leaque, Jr. et al.
patent: 3690334 (1972-12-01), Miller
Beaman Robert E.
Clark Willis F.
Coles Doris V.
Laughner Brothers, Inc.
Word A. Hugo
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