Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1993-06-07
1994-03-22
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03454266
REFERENCES:
patent: 1659962 (1928-02-01), Schaeffer
patent: 3426122 (1969-02-01), Caudelli et al.
patent: 4107894 (1978-08-01), Mullins
patent: 4186540 (1980-02-01), Mullins
Anderson Peter L.
Cowell Michael J.
Hotek Dan J.
Clark Doris
Societe Civile des Brevets Henri C. Vidal
Word A. Hugo
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