United States Patent 2801133
Inventors:
Ridley, Ian M.
Publication Date:
07/30/1957
Assignee:
BLASTCRETE EQUIPMENT CO INC
Other Classes:
138/147, 451/102, 285/179, 239/602
International Classes:
B05B7/14; B28C5/02; E04F21/12; B28C5/00; E04F21/02
US Patent References:
| 2594735 | Angle head abrasive blast nozzle | | | |