Building units and construction elements – Structure – Simulative
Patent
1975-05-02
1977-03-15
Word, A. Hugo
Building units and construction elements
Structure
Simulative
D2501
Patent
active
D02436973
REFERENCES:
patent: 490726 (1893-01-01), Stevenson
patent: 3877236 (1975-04-01), O'Neill et al.
patent: 3922864 (1975-12-01), Hilfiker
patent: D224292 (1972-07-01), McCaul
Hilfiker Pipe Co.
Neal Frank A.
Word A. Hugo
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