Invention Grant
- Patent Title: Trunk preference circuit for a communication switching system
- Patent Title (中): 用于通信切换系统的TRUNK偏置电路
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Application No.: US3532830DApplication Date: 1968-07-31
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Publication No.: US3532830APublication Date: 1970-10-06
- Inventor: WIRSING HOWARD L
- Applicant: AUTOMATIC ELECT LAB
- Assignee: Automatic Elect Lab
- Current Assignee: Automatic Elect Lab
- Priority: US74913168 1968-07-31
- Main IPC: H04Q3/54
- IPC: H04Q3/54 ; H04M3/22 ; H04Q3/64
Information query
