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 |
| 4041394 | Radio control transmitter In order to facilitate operation of a radio remote control transmitter, the transmitter components are built into the structure of a vest-like garment, and the transmitter is operated by placing a magnet on the wrist of the user adjacent one of a number o... | 08/09/1977 |
