IT987771B -
KEY TELEPHONE SYSTEM USING A TIME DIVISION AND SPACE DIVISION CONTROL
- Google Patents
KEY TELEPHONE SYSTEM USING A TIME DIVISION AND SPACE DIVISION CONTROL
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Publication number
IT987771B
IT987771BIT2436573AIT2436573AIT987771BIT 987771 BIT987771 BIT 987771BIT 2436573 AIT2436573 AIT 2436573AIT 2436573 AIT2436573 AIT 2436573AIT 987771 BIT987771 BIT 987771B
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Priority claimed from CA142,792Aexternal-prioritypatent/CA1018270A/en
Application filed by Int Standard Electric CorpfiledCriticalInt Standard Electric Corp
Application grantedgrantedCritical
Publication of IT987771BpublicationCriticalpatent/IT987771B/en