专利名称：Height level measuring device发明人：Loreto Calcagni,Daniel Joyce申请号：US07/132593申请日：19871214公开号：US04794704A公开日：19890103
摘要：A height level measuring device is provided and consists of an elongatedtransparent flexible hollow tube with scales at each open end thereof. A predeterminedamount of liquid is placed within the tube so that the liquid will seek same height level atboth ends no matter what height the ends are raised to, thus allowing height of twoobjects to be vertically measured when there is an obstacle between the two objects.
申请人：CALCAGNI; LORETO,JOYCE; DANIEL
代理人：Michael I. Kroll
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