-
公开(公告)号：US2059050A
公开(公告)日：1936-10-27
申请号：US65161633
申请日：1933-01-13
Applicant: NICHOLAS SMITH PERCY , GEORGE BROWN NORMAN
Inventor： NICHOLAS SMITH PERCY , GEORGE BROWN NORMAN
IPC: G01P1/12
CPC classification number: G01P1/122
Search Results
1
records
(took 0.015 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
