US Patent: 218,874 - Rotary Engine


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US Patent: 218,874

Rotary Engine

Patentee:

Hermann Graf (exact or similar names) - St. Petersburg, Russia

USPTO Classifications:

418/200

Tool Categories:

propulsion and energy : steam apparatus : rotary steam engines

Assignees:

Alexis Serguéévitch Dolgorouky - St. Petersburg, Russia

Manufacturer:

Unknown

Witnesses:

Patent Dates:
Applied:	Nov. 06, 1878
Granted:	Aug. 26, 1879

Patent Pictures:

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Description:

Patented in France, 03 Oct.,1878; in Italy, 07 Oct., 1878; in Great Britain, 12 Oct., 1878; in Belgium, 12 Oct., 1878; in Germany, 03 Oct., 1878 and in Austria-Hungary, 02 Feb., 1879.