Invention Grant
- Patent Title: Traffic between private automatic branch telephone exchanges
- Patent Title (中): 私人自动分机电话交换
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Application No.: US18590562Application Date: 1962-04-09
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Publication No.: US3211838APublication Date: 1965-10-12
- Inventor: ARVID ERICSSON ERIC
- Applicant: ERICSSON TELEFON AB L M
- Assignee: Ericsson Telefon Ab L M
- Current Assignee: Ericsson Telefon Ab L M
- Priority: SE441661 1961-04-27
- Main IPC: H04Q3/62
- IPC: H04Q3/62
Information query
