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Patent No. 6711769

Pillow with retractable umbrella

A pillow assembly having a supporting assembly and a retractable umbrella assembly that is easily transportable and allows a user to support his/her head while covering their face from sunlight.

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Class 73/750 - Resistive


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the displacement of the liquid effects
No. of patents: 1
Last issue date: 07/31/2007


NumberTitleIssue Date
7249516Method of operating a resistive heat-loss pressure sensor
In a resistively heated heat-loss pressure gauge, electrical current is switched between a sensing element and a compensating element at different duty cycles. As a result, the sensing element is heated relative to the compensating element. A fixed resistance is pla...
07/31/2007
 
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