Building units and construction elements – Structure – Fully enclosed
Patent
1977-11-14
1979-12-25
Word, A. Hugo
Building units and construction elements
Structure
Fully enclosed
D25 1, D25 58, D25 80, D2503
Patent
active
D02537915
REFERENCES:
patent: 2647287 (1953-08-01), Jones
patent: 2923383 (1960-02-01), Webb
patent: 3623285 (1971-11-01), Kelly
patent: 3626649 (1971-12-01), Ohkawa
patent: 3832605 (1974-08-01), Clark
patent: 4115962 (1978-09-01), Caisley
Skillman Henry H.
Word A. Hugo
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