-
公开(公告)号：US2974531A
公开(公告)日：1961-03-14
申请号：US67560457
申请日：1957-08-01
Applicant: INSTR DEV LAB INC
Inventor： SUMNER ACKERMAN
IPC: G01P15/12
CPC classification number: G01P15/12
Search Results
1
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
