NL78620C - - Google Patents

Info

Publication number
NL78620C
NL78620C NL78620DA NL78620C NL 78620 C NL78620 C NL 78620C NL 78620D A NL78620D A NL 78620DA NL 78620 C NL78620 C NL 78620C
Authority
NL
Netherlands
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL78620C publication Critical patent/NL78620C/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/001Two-way communication systems between a limited number of parties
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/005Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transmitters (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NL78620D 1947-12-23 NL78620C (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL654830X 1947-12-23

Publications (1)

Publication Number Publication Date
NL78620C true NL78620C (no)

Family

ID=19795188

Family Applications (1)

Application Number Title Priority Date Filing Date
NL78620D NL78620C (no) 1947-12-23

Country Status (6)

Country Link
US (1) US2616973A (no)
BE (1) BE486466A (no)
DE (1) DE815356C (no)
FR (1) FR977934A (no)
GB (1) GB654830A (no)
NL (1) NL78620C (no)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156909A (en) * 1962-07-03 1964-11-10 Mccune Electronics Inc Burglar alarm and monitoring system
US3513465A (en) * 1966-08-24 1970-05-19 Henry W Titherington Sound monitoring system having plural selectively disconnectable microphones and a central monitoring station
US3748397A (en) * 1972-05-10 1973-07-24 C Jones Portable remote broadcasting telephone system
JPS56143751A (en) * 1980-04-09 1981-11-09 Clarion Co Ltd Transceiver with interphone
US5809402A (en) * 1992-10-07 1998-09-15 The Boeing Company ACARS/VHF transceiver interface unit (AVIU)
WO1995034137A1 (en) * 1994-06-08 1995-12-14 The Boeing Company Transceiver interface unit for aircraft communication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182632A (en) * 1939-12-05 Communication recording system
US2077552A (en) * 1933-09-20 1937-04-20 Bishop & Babcock Mfg Co Radio signaling system and apparatus
US2164960A (en) * 1937-02-27 1939-07-04 Int Standard Electric Corp Combined radio receiving and intercommunication system
US2433413A (en) * 1944-02-21 1947-12-30 Internat Marine Radio Company Combined radio transmitter and loud-speaker installation

Also Published As

Publication number Publication date
GB654830A (en) 1951-06-27
FR977934A (fr) 1951-04-06
US2616973A (en) 1952-11-04
BE486466A (no)
DE815356C (de) 1951-10-01

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