Mack Truck Bulldog patent illustration, 1932.
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Filed July 21, 1932 this patent, numbered 87,931,  pictures two bulldog Automobile Radiator Caps.

Credit: Courtesy of The Mack Trucks Historical Museum.

Alfred F. Masury designed the famous Mack Bulldog ornament from a bar of soap during a 1932 hospital stay. One of the most recognized corporate symbols in the world, it has changed little since first introduced on Mack trucks in 1932.

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