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CPC Subgroup
G01C 17/28

Electromagnetic compasses (with north seeking magnetic elements and having electric pick-offs G01C17/26)

Full Title

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) > Magnetic compasses > Electromagnetic compasses (with north seeking magnetic elements and having electric pick-offs G01C17/26)

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