G01C17/20 - CPC Classification Index

ClassID:

164538 ⎘

G01C17/20 - CPC Classification

Classification description:

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes; Magnetic compasses with north-seeking magnetic elements, e.g. needles Observing the compass card or needle

Sub-classes:

G01C17/22 » by projection 1
G01C17/24 » Illumination 3
G01C17/26 » using electric pick-offs for transmission to final indicator, e.g. photocell 4

Recent Application in this class:

20210055106

2021-02-25

Compass device

20200162845

2020-05-21

Enhanced wearable device operation

20130014397

2013-01-17

Mirrored compass with improved sighting window

20070193045

2007-08-23

Device and method for display of azimuthal and other information

14274793

2014-11-18

Method and apparatus for displaying the direction of mecca on a wall or corner of a room