发明名称 Visual aid apparatus for viewing objects beneath water surface
摘要 A visual aid apparatus (10) is disclosed. The apparatus (10) permits clear vision through the surface of the water. Apparatus (10) includes a relatively thin transparent sheet (11) which is preferably circular. A buoyant, closed-wall member (12) is secured in a leakproof manner to sheet (11) to define a relatively shallow, pan-like container for floating on the surface of the water. Apparatus (10) also includes a relatively short length of tube pivotally mounted to the outer periphery of the container for holding a vacuum or suction pipe of the kind used to clean a swimming pool.
申请公布号 US4553819(A) 申请公布日期 1985.11.19
申请号 US19840625442 申请日期 1984.06.27
申请人 CORRELL, CHARLES 发明人 CORRELL, CHARLES
分类号 G02B23/22;G02B27/02;(IPC1-7):G02B5/00 主分类号 G02B23/22
代理机构 代理人
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