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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G01S15/88
Sonar systems specially adapted for specific applications
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G01S15/8906
Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
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G01S15/8959
using coded signals for correlation purposes
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G01S15/8963
using pulse inversion
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