Retaining wall block

Details Retaining wall block Retaining wall block

1990-11-30

1991-09-10

Word, A. Hugo

Building units and construction elements

Architectural stock material

Construction block or brick type

D25113

Patent

active

D03198855

REFERENCES:
patent: D21522 (1892-05-01), Lewis
patent: D36805 (1904-02-01), Palmer
patent: D249558 (1978-09-01), Blomquist
patent: 415773 (1889-11-01), Fiske
patent: 2629135 (1953-02-01), Johnson
patent: 2847848 (1958-08-01), Grants
Audel's Mason's & Builder's Guide .COPYRGT.1924 pp. 954, 956, 959, 961, 962 vol. 4.

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