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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7/00
Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
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G01S7/02
of systems according to group G01S13/00
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G01S7/06
Cathode-ray tube displays; or other two dimensional or three-dimensional displays
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G01S7/10
Providing two-dimensional [2D] co-ordinated display of distance and direction
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G01S7/12
Plan-position indicators, i.e. P.P.I.
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G01S7/14
Sector, off-centre, or expanded angle display
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