Charles Hink with his Wheel-aligning Gauge

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Charles Hink, an early Grinnell, Iowa, inventor, holds his wheel-alignment gauge. Thousands of the gauges were ordered by the United States government during World War II and the Korean and Vietnam conflicts. He received US Patent No. US 1970092 in 1934 for the device. Drake Community Library (Grinnell, Iowa) Archives. Miscellaneous photographs. Collection #17-6, People.