...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 |
| 5364118 | Front sole holding device The front sole holding device comprises a support bearing which is rotatably supported in lateral bearing blocks which are fixed with respect to the ski, the ski boot resting on the support bearing in a positive-locking manner in the cross-country skiing ... | 11/15/1994 |