-
公开(公告)号：US2791932A
公开(公告)日：1957-05-14
申请号：US37133653
申请日：1953-07-30
Applicant: SPECIALTIES DEV CORP
Inventor： CLIFFORD HALL CYRIL
IPC: G01N21/53
CPC classification number: G01N21/534
-
公开(公告)号：US2712643A
公开(公告)日：1955-07-05
申请号：US27447452
申请日：1952-03-01
Applicant: SPECIALTIES DEV CORP
Inventor： CLIFFORD HALL CYRIL
IPC: G01N21/53
CPC classification number: G01N21/53
-
Search Results
2
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
