Patent 4,017,858

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US 4,017,858 is a patent by Polhemus. Its title is "Apparatus for Generating a Nutating Electromagnetic Field".

It involves using a nutating magnetic field to determine an object's position and orientation.[1] It involves using signals that have an alternating current (AC). It involves three mutually orthogonal coils of wire, which are electromagnets. In the patent, they are called "radiators".

It references patent 3,868,565.

The inventor is Jack Kuipers.[1]

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