-
公开(公告)号：US2140073A
公开(公告)日：1938-12-13
申请号：US20846638
申请日：1938-05-17
Applicant: JOHN WIDDICOMB COMPANY
Inventor： BERT CZUBINSKI
IPC: A47B1/04
CPC classification number: A47B1/04
Search Results
1
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
