专利名称：OVERHEAD DOOR ASSEMBLY发明人：DICKINSON H,US申请号：US38774773申请日：19730813公开号：US3839827A公开日：19741008
摘要：An overhead door assembly in which the top edge of the door travels indownwardly opening bow shaped tracks and horizontal transverse pivots on the sides ofthe door travel in vertical tracks. The top of the door is strengthened and overhangs thebottom which reduces water drip-off and icing at the bottom edge of the door.
申请人：DICKINSON H,US
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