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Patent number:
Patent Date:
US Patent: 1,866,794
Lawn mower sharpening machine
Patentee:
Frank H. Bierman (
exact
or
similar
names) - Minneapolis, MN
USPTO Classifications:
451/114
,
56/250
Tool Categories:
metalworking machines
:
grinders
:
sharpening machines
household
:
lawn mowers
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jun. 18, 1931
Granted:
Jul. 12, 1932
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Description:
Improvements to patent
1,444,100
.
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