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Patent number:
Patent Date:
US Patent: 447,831
Rotary Engine
Patentee:
Mathew Johnson (
exact
or
similar
names) - Chicago, Cook County, IL
USPTO Classifications:
418/12
,
418/244
Tool Categories:
propulsion and energy
:
steam apparatus
:
rotary steam engines
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
May 20, 1890
Granted:
Mar. 10, 1891
Patent Pictures:
USPTO
(New site tip)
Google Patents
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