Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4700168 | Integrated temperature control unit A temperature control device of the bulb and capillary tube type having a molded plastic housing that has integrally formed support members for positioning and securing individual switch blades and temperature sensing components. The individual switch com... | 10/13/1987 |
| 4115751 | Thermostat and method of operating such A thermostat for regulating temperature of a space. The thermostat has a pair of means selectively manually movable therein within a predetermined range of temperature settings for setting a selected temperature of the space. Means mounted in lost motion ... | 09/19/1978 |
