CPC Subgroup
G01P 3/68 using optical means, i.e. using infrared, visible, or ultraviolet light (G01P3/80 takes precedence )
Full Title
Measuring linear or angular speed; Measuring differences of linear or angular speeds (G01P5/00 - G01P11/00 take precedence; ; counting mechanisms G06M) > Devices characterised by the determination of the time taken to traverse a fixed distance > using optical means, i.e. using infrared, visible, or ultraviolet light (G01P3/80 takes precedence )
1 direct subcode
Child Classifications
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