BR7901085A - Sistema de comunicacoes de dois sentidos - Google Patents

Sistema de comunicacoes de dois sentidos

Info

Publication number
BR7901085A
BR7901085A BR7901085A BR7901085A BR7901085A BR 7901085 A BR7901085 A BR 7901085A BR 7901085 A BR7901085 A BR 7901085A BR 7901085 A BR7901085 A BR 7901085A BR 7901085 A BR7901085 A BR 7901085A
Authority
BR
Brazil
Prior art keywords
communications system
sense
sense communications
communications
Prior art date
Application number
BR7901085A
Other languages
English (en)
Inventor
L Waldorf
K Monroe
M White
Original Assignee
M White
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.)
Filing date
Publication date
Priority claimed from US05/909,685 external-priority patent/US4166978A/en
Application filed by M White filed Critical M White
Publication of BR7901085A publication Critical patent/BR7901085A/pt

Links

Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/30—Mounting radio sets or communication systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
BR7901085A 1978-05-25 1979-02-16 Sistema de comunicacoes de dois sentidos BR7901085A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/909,685 US4166978A (en) 1976-09-07 1978-05-25 Two-way voice controlled communication system

Publications (1)

Publication Number Publication Date
BR7901085A true BR7901085A (pt) 1979-11-20

Family

ID=25427662

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7901085A BR7901085A (pt) 1978-05-25 1979-02-16 Sistema de comunicacoes de dois sentidos

Country Status (8)

Country Link
JP (1) JPS54154212A (pt)
BR (1) BR7901085A (pt)
CA (1) CA1116239A (pt)
DE (1) DE2920834A1 (pt)
FR (1) FR2427014A1 (pt)
GB (1) GB2021902B (pt)
IT (1) IT1116191B (pt)
MX (1) MX145103A (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271247B (en) * 1992-10-05 1997-02-19 Motorola Israel Ltd A radio telephone for a vehicle
DE9409319U1 (de) * 1994-06-08 1995-07-06 Berlin, Florence, Genf Sende-Empfangsgerät
US8224286B2 (en) * 2007-03-30 2012-07-17 Savox Communications Oy Ab (Ltd) Radio communication device

Also Published As

Publication number Publication date
CA1116239A (en) 1982-01-12
IT1116191B (it) 1986-02-10
DE2920834A1 (de) 1979-11-29
JPS54154212A (en) 1979-12-05
IT7949130A0 (it) 1979-05-22
GB2021902B (en) 1982-08-25
GB2021902A (en) 1979-12-05
MX145103A (es) 1982-01-05
FR2427014A1 (fr) 1979-12-21

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