Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1988-08-19
1991-02-19
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03148297
REFERENCES:
patent: 653515 (1900-07-01), Kennedy
patent: 741497 (1903-10-01), Ivery
patent: 1198940 (1916-09-01), McGiehan
patent: 1456499 (1923-05-01), Gerald
patent: 1976575 (1934-10-01), MacDonald
patent: 2099149 (1937-02-01), Turnquist
Modular Concrete Block publication dated Jun. 1984, p. 23, illustration on third row extreme right of page, item #PF-504.
Clark Doris
Dubno Herbert
Word A. Hugo
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