Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L25/00—Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus
  • B61L25/02—Indicating or recording positions or identities of vehicles or vehicle trains
  • B61L25/04—Indicating or recording train identities
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L25/00—Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus
  • B61L25/02—Indicating or recording positions or identities of vehicles or vehicle trains
  • B61L25/04—Indicating or recording train identities
  • B61L25/043—Indicating or recording train identities using inductive tags
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L25/00—Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus
  • B61L25/02—Indicating or recording positions or identities of vehicles or vehicle trains
  • B61L25/04—Indicating or recording train identities
  • B61L25/045—Indicating or recording train identities using reradiating tags
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
  • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
  • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
  • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
  • G01S13/758—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator powered by the interrogation signal
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
  • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Applications Claiming Priority (1)

Publications (1)

Family

ID=8568154

Family Applications (1)

Country Status (7)

• 1965
  • 1965-01-14 FR FR1903A patent/FR1429403A/fr not_active Expired
  • 1965-12-30 FR FR44362A patent/FR89344E/fr not_active Expired
• 1966
  • 1966-01-11 GB GB132466A patent/GB1128067A/en not_active Expired
  • 1966-01-13 ES ES0321704A patent/ES321704A1/es not_active Expired
  • 1966-01-13 DE DE19661491922 patent/DE1491922A1/de active Pending
  • 1966-01-13 NL NL6600441A patent/NL6600441A/xx unknown
  • 1966-01-13 BE BE675070D patent/BE675070A/xx unknown
  • 1966-01-14 CH CH46666A patent/CH461570A/fr unknown

Also Published As

Similar Documents