Building block

Details Building block Building block

1983-02-03

1985-12-03

Word, A. Hugo

Building units and construction elements

Structure

Simulative

D25 80, D25 91

Patent

active

D02816288

REFERENCES:
patent: 1378735 (1921-05-01), Talbot
patent: 1886404 (1932-11-01), Kipple
patent: 2047882 (1936-07-01), McPherson
patent: 2205419 (1940-06-01), Kraemer
patent: 2749739 (1956-06-01), Zagray

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