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US Patent: D4,615
Design for a Plow-Clevis
Patentee:
John M. Cook (exact or similar names) - Marion, IN

USPTO Classifications:
D15/11

Tool Categories:
agricultural : clevises

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
R. H. Jones
William D. McKinney
Patent Dates:
Granted: Jan. 31, 1871

Patent Pictures:
Design patent D4,615 -- edited image
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Description:
The "heart" shaped opening is to allow for lateral motion without deflecting the main line of draft.

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