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US Patent: 510,375
Winding Key For Guitars
Patentee:
John Ayuso (exact or similar names) - Brooklyn, NY

USPTO Classifications:
84/306

Tool Categories:
wrenches : socket wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. Sedgwick
Paul Jobst
Albert Landbeck
John H. Frey
Patent Dates:
Applied: Mar. 03, 1893
Granted: Dec. 05, 1893

Patent Pictures:
John Ayuso patent December 5, 1893
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Description:
The patent is for a "supplemental key" -- a socket wrench -- to improve the working of tuning keys for stringed musical instruments.

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