Construction block

Details Construction block Construction block

1997-04-30

1998-11-17

Bullock, B. J.

Building units and construction elements

Architectural stock material

Construction block or brick type

2501

Patent

active

D04013565

REFERENCES:
patent: 170331 (1875-11-01), Berryman
patent: 307395 (1884-10-01), Jones
patent: D319885 (1991-09-01), Blomquist et al.
patent: D321060 (1991-10-01), Blomquist et al.
patent: D346667 (1994-05-01), Blomquist et al.
patent: D350402 (1994-09-01), Pribyl et al.
patent: 2847848 (1958-08-01), Grants
patent: 4993206 (1991-02-01), Pardo
patent: 5044834 (1991-09-01), Janopaul, Jr.

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