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US Patent: 3,869,803
Drill guide for enlarging engine valve stem guides
Patentee: Merle E. Vaughan (exact or similar names) - Kansas City, KS USPTO Classifications: 33/611, 408/241G Tool Categories: specialty tools : automotive tools Assignees: Peterson Machine Tool, Inc. - Merriam, KS Manufacturer: Peterson Machine Tool, Inc. - Merriam, KS Witnesses: Unknown	Patent Dates: Applied: Dec. 17, 1973 Granted: Mar. 11, 1975 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Peterson Welding Lab, Inc.
Description: The firm of Peterson Welding, Lab, Inc., changed its name in 1858 to Peterson Machine Tool, Inc.

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