Patent search ap:("PHILIPS LAB INC") AND inv:"SAMUEL FINE" Page 1

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发明授权
Relative humidity measuring apparatus 失效

公开(公告)号：US2638783A

公开(公告)日：1953-05-19

申请号：US7511849

申请日：1949-02-08

Applicant: PHILIPS LAB INC

Inventor： RITTNER EDMUND S , SAMUEL FINE

IPC: G01N25/56 , G06G7/24 , G06G7/48

CPC classification number: G01N25/56 , G06G7/24 , G06G7/48

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