-
公开(公告)号：US2632961A
公开(公告)日：1953-03-31
申请号：US25314051
申请日：1951-10-25
Applicant: VENANGO ENGINEERING CO INC
Inventor： ALEXANDER ROBERTSON
IPC: D06F58/12
CPC classification number: D06F58/12
-
公开(公告)号：US2286107A
公开(公告)日：1942-06-09
申请号：US30873039
申请日：1939-12-11
Applicant: VENANGO ENGINEERING CO
Inventor： ALEXANDER ROBERTSON
IPC: D06B5/20
CPC classification number: D06B5/20
-
Search Results
2
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
