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US Patent: 518,328
Wrench And Straightener For Threshing Machine Teeth
Patentee:
Edward W. Oakey - Chatfield, MN

USPTO Classifications:
7/138, 7/169, 81/124.3, D8/17

Tool Categories:
wrenches : cylinder tooth wrenches

Assignees:
None

Manufacturer:
E. R. Keys - Dover, MN

Witnesses:
C. K. Davies
C. W. Johnson
F. V. Edwards
E. M. Edwards

Patent Dates:
Applied: Dec. 12, 1893
Granted: Apr. 17, 1894

Patent Pictures: [ 1 | 2 ]
Edward Oakey patent April 17, 1894
USPTO pdf tiff
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Description:
Box end wrench with two tooth straightener slots in the end of the handle.

The manufactured wrench is heavier than suggested in the patent drawings.

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