ROUTINERS FOR CHECKING TELEPHONE CIRCUITS

• US 3,489,865 A
• Filed: 06/22/1966
• Issued: 01/13/1970
• Est. Priority Date: 06/25/1965
• Status: Expired due to Term

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Treffinger Hans, Waitz Gerhard
• Inventors: WAITZ GERHARD, TREFFINGER HANS
• Application Number:
  US04/559,570
• Time in Patent Office: 1,301 Days
• US Class Current: 379/24
• CPC Class Codes: G01R 31/50 Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections testing of sparking plugs H01T13/58
• CPC Class Codes: H04M 3/28 Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor

Claims