Modular block

Details Modular block Modular block

1992-03-30

1993-10-12

Word, A. Hugo

Building units and construction elements

Architectural stock material

Construction block or brick type

Patent

active

D03402932

REFERENCES:
patent: D299069 (1988-12-01), Risi et al.
patent: D305938 (1990-02-01), Risi et al.
patent: D320088 (1991-09-01), Risi et al.
patent: 788430 (1905-04-01), Schall
patent: 1032858 (1912-07-01), Pettit
patent: 1086295 (1914-02-01), Hillman
patent: 1773579 (1930-08-01), Flath
patent: 2083987 (1937-06-01), Davis
patent: 3845593 (1974-11-01), Zen
patent: 3936989 (1976-02-01), Hancock
patent: 4367615 (1983-01-01), Feldman

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