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• 2006-04-28 01:30 Nagle 400×457×8 (60167 bytes) Image from U.S. patent #1,958,918. Uncopyrightable under US law.
• 2006-04-21 12:27 Timharwoodx 387×518×1 (8849 bytes) The image is from a USPTO document, a government publication, from 1934.