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公开(公告)号：US2089351A
公开(公告)日：1937-08-10
申请号：US1788235
申请日：1935-04-23
Applicant: JACK PEARSON
Inventor： WILBUR ENGLISH WILLARD
CPC classification number: G01J1/04 , G01J1/0474 , Y10S160/07 , Y10S362/812 , Y10S428/918 , Y10T428/31804 , Y10T428/31986 , Y10T442/3854
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