Corner block

Details Corner block Corner block

1990-08-31

1992-10-13

Word, A. Hugo

Building units and construction elements

Architectural stock material

Construction block or brick type

D 6300, D25 60

Patent

active

D03302636

REFERENCES:
patent: D17293 (1887-05-01), Johnson
patent: D208692 (1967-09-01), Morgan
patent: D234506 (1975-03-01), Spellier
patent: D307078 (1990-04-01), Guillemet
patent: D319541 (1991-09-01), Stewart
patent: D319884 (1991-09-01), Hall
patent: 329680 (1885-11-01), Schamweber
patent: 2315617 (1943-04-01), Hamson
patent: 2576260 (1951-11-01), Metts
patent: 2942703 (1960-06-01), Nelsson

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