Machines not elsewhere specified – Material working – abrading – or founding machinery – Molding or casting
Patent
1986-07-07
1987-09-01
Bullock, B. J.
Machines not elsewhere specified
Material working, abrading, or founding machinery
Molding or casting
Patent
active
D02917009
REFERENCES:
patent: 1349819 (1920-08-01), Davidson
patent: 1461409 (1923-07-01), White
patent: 3632078 (1972-01-01), Doshew
patent: 4243200 (1981-01-01), Beer et al.
Sweet's Architectural Catalog file 1978; sec. 3.5 Ce, p. 4, Tapered end form mold.
Bullock B. J.
Roberts, Jr. John S.
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