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US Patent: 447,535
Rotary Engine
Patentees:
William G. Billings (exact or similar names) - Larned, Pawnee County, KS
Avery W. Billings (exact or similar names) - Larned, Pawnee County, KS

USPTO Classifications:
418/144

Tool Categories:
propulsion and energy : steam apparatus : rotary steam engines

Assignees:
William G. Billings - Larned, Pawnee County, KS
Avery W. Billings - Larned, Pawnee County, KS
Arthur T. Billings - Larned, Pawnee County, KS

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 23, 1890
Granted: Mar. 03, 1891

Patent Pictures:
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