-
公开(公告)号：US2324809A
公开(公告)日：1943-07-20
申请号：US45192842
申请日：1942-07-22
Applicant: BELL TELEPHONE LABOR INC
Inventor： ABBOTT LESTER E , WERRING WALTER W
IPC: B23K1/00
CPC classification number: B23K1/0004 , Y10T29/49105
Search Results
1
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
