Building block

Details Building block Building block

1978-03-16

1980-07-29

Word, A. Hugo

Building units and construction elements

Structure

Simulative

D25 80, D25 91, D25 92, D2501

Patent

active

D02561662

REFERENCES:
patent: 3204381 (1965-09-01), Perreton
patent: 3318059 (1967-05-01), Wright
patent: 4071989 (1978-02-01), Warren

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