...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 |
| 6499617 | Rotary seal stopper Rotary seal valve/container assembly allowing withdrawal of a medical fluid contained in the container by the use of a device such as a syringe or IV set having a luer connector. The rotary seal valve includes: an elastomeric stopper having a cavity; a ro... | 12/31/2002 |