Mold for building block units

Details Mold for building block units Mold for building block units

1980-11-03

1982-12-28

Bullock, B. J.

Machines not elsewhere specified

Material working, abrading, or founding machinery

Molding or casting

D1509

Patent

active

D02674076

REFERENCES:
patent: 511098 (1893-12-01), Shultz
patent: 720536 (1903-02-01), Seamams
patent: 1166312 (1915-12-01), Barten
patent: 3998423 (1976-12-01), Mullins

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