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 |
| 6827075 | Apparatus for burning stone An automated stone burning apparatus, which precisely adjusts the burning operation and improves the throughput. The apparatus consists of a torch assembly that is mounted in proximity to a stone slab lying upon a roller bed. The torch assembly is movable both trans... | 12/07/2004 |
| 4914870 | Process for automatically smoothing and polishing slabs or marble, granite, stones and the like The method according to the present invention, permits to smooth and polish automatically and semicontinuously slabs of marble, granite and stones of every type while improving substantially the uniformity of smoothing and polishing of the surfaces being ... | 04/10/1990 |
