Concrete cobblestone block

Details Concrete cobblestone block Concrete cobblestone block

1994-10-03

1995-12-26

Clark, Doris

Building units and construction elements

Architectural stock material

Construction block or brick type

Patent

active

D03656438

REFERENCES:
patent: D185592 (1959-06-01), Clanton
patent: D197127 (1963-12-01), Stoy
patent: D250898 (1979-01-01), Schuring
patent: D326530 (1992-05-01), Lewis
patent: D330435 (1992-10-01), Dukart et al.
patent: 338490 (1886-03-01), Cowan
patent: D341218 (1993-11-01), Easy
patent: D343237 (1994-01-01), Johnson, II
patent: D343460 (1994-01-01), Hair
patent: 1819016 (1931-08-01), Davey
patent: 4544305 (1985-10-01), Hair
patent: 4633636 (1987-01-01), Deimen

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