Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B3/00—Line transmission systems
  • H04B3/02—Details
  • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Interface Circuits In Exchanges (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6150894

Family Applications (1)

Country Status (4)

• 0
  • NL NL32860D patent/NL32860C/xx active
  • BE BE363265D patent/BE363265A/xx unknown
• 1929
  • 1929-08-16 GB GB25091/29A patent/GB317852A/en not_active Expired
• 1931
  • 1931-11-23 FR FR41061D patent/FR41061E/fr not_active Expired

Also Published As

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