Invention Grant
- Patent Title: Telephone system
-
Application No.: US24731028Application Date: 1928-01-17
-
Publication No.: US1738294APublication Date: 1929-12-03
- Inventor: GOODERHAM JOHN W
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US24731028 1928-01-17
- Main IPC: H04M15/28
- IPC: H04M15/28
Information query
