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SCANNER ARRANGEMENT FOR IDENTIFYING CIRCUITS CHANGING THEIR STATES,STORING THE TIMES OF SUCH CHANGE,AND DETERMINING THE CHARACTER OF THE CHANGE IN A COMMUNICATION SWITCHING SYSTEM

  • US 3,532,827 A
  • Filed: 10/19/1967
  • Issued: 10/06/1970
  • Est. Priority Date: 10/19/1967
  • Status: Expired due to Term
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