Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. The Shipman Manufacturing Company, Los Angeles, California, manufactured this postage stamp vending machine. Two holes ...
Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. The Postage Stamp Machine Company manufactured this vending machine with U.S. patent number 2,444,747, issued on July ...
A: The machines were removed because the equipment was old and obsolete making it difficult to make repairs, according to McKinney Boyd, U.S. Postal Service spokesman. "Not enough people are buying ...
Scientific American is the authority on science and technology for a general audience, with coverage that explains how research changes our understanding of the world and shapes our lives. First ...
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