Building units and construction elements – Structure – Simulative
Patent
1978-11-09
1981-05-12
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D25 80, D2501
Patent
active
D02592150
REFERENCES:
patent: D253911 (1980-01-01), Hendrickson et al.
patent: 1804753 (1931-05-01), Douglas
patent: 3013626 (1961-12-01), Brown et al.
Conwed Corporation
Word A. Hugo
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