Lyon & Lyon
Athletic knee pad
 A protective pad, such as an athletic knee pad, which is worn about the knee to provide protection to a joint such as the knee cap, in which the pad has a padded front section, an elastic rear section, an adjustable upper elastic sleeve, and an elastic lower sleeve of a smaller diameter than the main body of the pad. 
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Y10S A41D A41D Y10S
additional inventional inventional additional
Cheng-Shung
Chang