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Patent number:
Patent Date:
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
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2
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3
]
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