NL29670C - - Google Patents

Info

Publication number
NL29670C
NL29670C NL29670DA NL29670C NL 29670 C NL29670 C NL 29670C NL 29670D A NL29670D A NL 29670DA NL 29670 C NL29670 C NL 29670C
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 NL29670C publication Critical patent/NL29670C/xx

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Special Spraying Apparatus (AREA)
  • Reciprocating Pumps (AREA)
NL29670D 1928-06-28 NL29670C (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1880428A GB319084A (en) 1928-06-28 1928-06-28 Improvements in sound transmitter

Publications (1)

Publication Number Publication Date
NL29670C true NL29670C (en:Method)

Family

ID=10118701

Family Applications (1)

Application Number Title Priority Date Filing Date
NL29670D NL29670C (en:Method) 1928-06-28

Country Status (4)

Country Link
DE (1) DE485478C (en:Method)
FR (1) FR656979A (en:Method)
GB (1) GB319084A (en:Method)
NL (1) NL29670C (en:Method)

Also Published As

Publication number Publication date
DE485478C (de) 1929-11-15
GB319084A (en) 1929-09-19
FR656979A (fr) 1929-05-17

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