Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M9/00—Arrangements for interconnection not involving centralised switching
  • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=22241044

Family Applications (1)

Country Status (2)

• 0
  • NL NL65702D patent/NL65702C/xx active
• 1946
  • 1946-08-19 FR FR938321D patent/FR938321A/fr not_active Expired

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