US2640592A
ATTORNEY June 2, 1953 F. M. FINGER PORTABLE GRAVEL SCREEN Filed June 30, 1949 .2 Sheets-Sheet 2 FIG. ll. INVENTOR PHILIP M. FINGER ATTORNEY Patented June 2, 1953 UNITED STATES PATENT OFFICE PORTABLE GRAVEL SCREEN Philip M. Finger, St. Louis, Mo. Application June 3'0, 1949, Serial No. 102,373 .
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