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 |
| 5094387 | Adjustable hook flange guard rail for use on trackwork An adjustable hook flange guard rail assembly for use on trackwork including a guard rail, a plurality of tie plates having first and second recessed surfaces for receiving the base portions of rails and the hook flange of a guard rail, a plurality of adj... | 03/10/1992 |
| 4386751 | Switch point guard A switch point guard for railroad track having a guard or deflector rail positioned to prevent flanges of railroad wheels from striking the switch point. The guard rail is carried on support members for rigid retention in a fixed, predetermined position r... | 06/07/1983 |
