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 |
| 5239710 | Spa pool The spa pool (1) is constructed with a solid base and side walls (4), the spa pool having a soft interior. The water is contained in a vinyl liner (5), and between the liner (5) and the base and/or the side walls (4) there is positioned a layer of resilie... | 08/31/1993 |
