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US Patent: 756,388
Means for converting reciprocatory into rotary motion
Patentee:
William B. May (exact or similar names) - Denver, CO

USPTO Classifications:
192/43.1, 74/127, 74/424.84, 74/89.45

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Evelyn Beauchamp
S. J. Ruhl
Patent Dates:
Applied: Apr. 09, 1903
Granted: Apr. 05, 1904

Patent Pictures:
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