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US Patent: 2,560,449
Free piston engine
Patentees: Martin Kahr (exact or similar names) - Milwaukee, WI Vincent R. Noll (exact or similar names) - Milwaukee, WI USPTO Classifications: 91/243, 91/25, 91/39 Tool Categories: Assignees: Filer & Stowell Co. - Milwaukee, WI Manufacturer: Filer & Stowell Co. - Milwaukee, WI Witnesses: Unknown	Patent Dates: Applied: Jan. 02, 1947 Granted: Jul. 10, 1951 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Filer & Stowell Co.

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