-
公开(公告)号：US1988993A
公开(公告)日：1935-01-22
申请号：US44803830
申请日：1930-04-28
Applicant: PHILIPS NV
Inventor： ALBERT BOUWERS , GERARD BURGERS WILHELM , ARON BIERMAN
IPC: G01N33/38
CPC classification number: G01N33/381
Search Results
1
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
