Patent search ap:("ERICSSON TELEFON AB L M") AND inv:"GOSTA LYSELL RALPH AKE" Page 1

1.

发明授权
Telephone handset 失效

公开(公告)号：US2419388A

公开(公告)日：1947-04-22

申请号：US41513041

申请日：1941-10-15

Applicant: ERICSSON TELEFON AB L M

Inventor： HUGO BLOMBERG KNUT , GOSTA LYSELL RALPH AKE

IPC: H04M1/02

CPC classification number: H04M1/0202 , Y10S220/13

Patent Agency Ranking