Facing block

Details Facing block Facing block

1993-06-04

1994-05-17

Word, A. Hugo

Building units and construction elements

Architectural stock material

Construction block or brick type

Patent

active

D03470709

REFERENCES:
patent: D183597 (1958-09-01), Clark
patent: D300253 (1989-03-01), Forsberg
patent: D300254 (1989-03-01), Forsborg
patent: 3418774 (1968-12-01), Kocher et al.
patent: 4608795 (1986-09-01), Neuschaeffer et al.
patent: 4776728 (1988-10-01), Sprehn
patent: 4802320 (1989-02-01), Forsberg

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