William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7011445 | Maximum/minimum thermometer This invention relates to maximum/minimum thermometer of the type comprising an expansion liquid, a transfer liquid and indexes for recording the maximum and minimum temperatures. Described in particular are new transfer liquids designed to replace conventionally us... | 03/14/2006 |
| 7004623 | Disposable sheath for data logger probe and method for measuring and recording temperature in a closed container A disposable sheath for a data logger probe comprises a mounting plate 12 and an elongated sheath 14 attached perpendicularly to the mounting plate for insertion through the wall or top cover and into the interior of a container, the mounting plate hav... | 02/28/2006 |
| 4819250 | Apparatus for measuring temperature at a hot point along an electrical energy transmission cable Apparatus for measuring temperature at a hot point along an energy transmission cable (1) when the temperature exceeds a fixed limit temperature, the apparatus comprising a tube (3) containing a liquid which is vaporizable in the vicinity of said limit te... | 04/04/1989 |
| 4036058 | Hot spot thermometer A thermometer unit for monitoring the temperature of a fluid cooled electric transformer, the thermometer unit having a ceramic body insertable between the coils of the transformer winding immersed in cooling fluid in the transformer case. A nylon rod res... | 07/19/1977 |