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 |
| 5316672 | Device for skimming oil from water A dual drum skimmer is provided for the removal and recovery of oil floating on water. The skimmer includes two oil pick-up drums 11 and 12 arranged along a common axis which pick up oil and deposit it in a collection trough 16. Oil deposited in the colle... | 05/31/1994 |
