Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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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
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15/00
Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
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G01S15/87
Combinations of sonar systems
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G01S15/876
Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector
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G01S15/878
wherein transceivers are operated, either sequentially or simultaneously, both in bi-static and in mono-static mode, e.g. cross-echo mode
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