| http://www.w3.org/ns/prov#value | - Overhead Door Corporation (Lewisville, TX)International Classification: H02P 1/00U.S. Classification: 318280, 318254, 318439, 318445Abstract: A motorized operator for moving a barrier, such as an upward acting garage door, between open and closed positions includes a support mounted adjacent one of a pair of barrier guide tracks or along a barrier counterbalance shaft and a drive mechanism mounted
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