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US Patent: 57,966
Improvement in screws
Patentee:
Treat T. Prosser (exact or similar names) - Chicago, IL

USPTO Classifications:
411/423, 411/425

Tool Categories:

Assignees:
G. W. Gillett - Unknown, Unknown
J. A. Eastman - Unknown, Unknown
D. W. Wells - Unknown, Unknown
D. A. Kimbark - Unknown, Unknown
Treat T. Prosser - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
H. H. Evarts
P. A. Hoyne

Patent Dates:
Granted: Sep. 11, 1866

Patent Pictures:
USPTO (New site tip)
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