US4737794A

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US4737794A is a patent on electromagnetic tracking systems.[1]

It is filed by Polhemus when Polhemus was owned by McDonnell Douglas Corp.[1]

References[edit]

  1. ↑ 1.0 1.1 "Method and apparatus for determining remote object orientation and position". 1985-12-09. https://patents.google.com/patent/US4737794A/.
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