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US Patent: 138,815
Improvement in lock-cutting machines
Patentee:
Isaac L. Penney (exact or similar names) - Minneapolis, MN

USPTO Classifications:
147/46

Tool Categories:
woodworking machines : specialty woodworking machines : hoop making machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. O. Hamlin
Vernon Bell

Patent Dates:
Applied: Apr. 03, 1873
Granted: May 13, 1873

Patent Pictures: [ 1 | 2 | 3 ]
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