Block

Details Block Block

1992-11-27

1994-09-13

Word, A. Hugo

Building units and construction elements

Architectural stock material

Construction block or brick type

Patent

active

D03506100

REFERENCES:
patent: D136666 (1943-11-01), Esson
patent: 1334599 (1920-03-01), Cusick
patent: 1474779 (1923-11-01), Kammer
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patent: 2111003 (1938-03-01), Petty
patent: 2313363 (1943-03-01), Schmitt
patent: 2957278 (1960-10-01), Woodworth
patent: 3094952 (1963-06-01), Hever
patent: 3229439 (1966-01-01), Strobel
patent: 3435576 (1969-04-01), Giannelia
patent: 3834108 (1974-09-01), Ludvigsen
patent: 3923410 (1975-12-01), Jordan et al.
patent: 3996715 (1976-12-01), Dowse
patent: 4583341 (1986-04-01), Barth et al.
patent: 4711599 (1987-12-01), Glickman
patent: 4773790 (1988-09-01), Hagenah
patent: 4887403 (1989-12-01), Bonner

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