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US Patent: 3,561,120
Distance measurement with friction wheel devices
Patentee: Irven Harold Culver (exact or similar names) - Playa Del Rey, CA USPTO Classifications: 33/711 Tool Categories: Assignees: Primus Manufacturing Co. - San Lorenzo, PR Manufacturer: Southwestern Industries, Inc. - Los Angeles, CA Witnesses: Unknown	Patent Dates: Applied: Jan. 24, 1969 Granted: Feb. 09, 1971 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Southwestern Industries, Inc.

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