Building units and construction elements – Structure – Simulative
Patent
1977-04-27
1979-03-13
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D25 87, D25 92, D2501
Patent
active
D02513072
REFERENCES:
patent: D220622 (1971-05-01), Passander
patent: D225846 (1973-01-01), Cruzen, Jr.
patent: 1552077 (1925-09-01), Palanti
patent: 2209730 (1940-07-01), Hausner
patent: 3534518 (1970-10-01), Zagray
Townsend Stephen S.
Word A. Hugo
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