Invention Grant
- Patent Title: Telephone system
-
Application No.: US46001730Application Date: 1930-06-09
-
Publication No.: US1819683APublication Date: 1931-08-18
- Inventor: KNUT LARSSON
- Applicant: ERICSSON TELEFON AB L M
- Assignee: Ericsson Telefon Ab L M
- Current Assignee: Ericsson Telefon Ab L M
- Priority: SE356217X 1929-06-21
- Main IPC: H01H50/62
- IPC: H01H50/62 ; H04Q3/00
Information query
