-
公开(公告)号：US1932070A
公开(公告)日：1933-10-24
申请号：US51902531
申请日：1931-02-28
Applicant: ECONOMICS LAB
Inventor： GRANT ULYSSES S , LANE THOMAS D
IPC: A47L15/44
CPC classification number: A47L15/4436
Search Results
1
records
(took 0.007 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
