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Patent number:
Patent Date:
US Patent: 2,474,500
High-low speed attachment for drill presses
Patentee:
Frederick Kenneth Stein (
exact
or
similar
names) - Rockford, IL
USPTO Classifications:
123/198D
,
474/79
,
474/89
Tool Categories:
industrial machines
:
industrial machine mechanisms
:
industrial machine pulleys and belt drive mechanisms
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jan. 07, 1948
Granted:
Jun. 28, 1949
Patent Pictures:
USPTO
(New site tip)
Google Patents
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