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 |
| 6431261 | Shell and tube type heat exchanger The temperature distribution in a shell and tube type heat exchanger having an expansion joint is uniformized by improving the circulation efficiency of fluid in the shell side. The uniformization is attained by the heat exchanger having an invasion-preve... | 08/13/2002 |
| 5775414 | High temperature high pressure air-to-air heat exchangers and assemblies useful therein What is disclosed herein is high pressure, high temperature, heat exchanger segments, combinations of such segments to form novel high pressure, high temperature, heat exchangers, novel pan assemblies for use in such heat exchangers, and systems and indus... | 07/07/1998 |
