Building units and construction elements – Structure – Simulative
Patent
1980-06-16
1982-08-03
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D25 80, D25 92, D2501
Patent
active
D02656892
REFERENCES:
patent: D187267 (1960-02-01), Marsh
patent: 405429 (1889-06-01), Missud
patent: 786250 (1905-03-01), Dunham
patent: 2484062 (1949-10-01), Abbott
patent: 2506563 (1950-05-01), Abbott
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