Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 6649123 | Apparatus for the scanning of working levels An apparatus for scanning the working level of a cutting tool relative to the surface of a workpiece and provided with a scanning arm adapted to move relative to the surface of the work piece and movable in response to an irregularity in the surface for o... | 11/18/2003 |
