Building units and construction elements – Structure – Simulative
Patent
1977-03-03
1979-11-27
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D25 74, D25 77, D25 78, D2501
Patent
active
D02535521
REFERENCES:
patent: 420201 (1890-01-01), Hodges
patent: 1586053 (1926-05-01), Snyder
patent: 3534517 (1970-10-01), Kann
Jones, Jr. Harold D.
Word A. Hugo
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