4. Geometrical instruments
  5. Indicator of direction of force traversing natural media
  6. Gyroscopically controlled or stabilized

Francis Boyer

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Fault display device for gyroscopic instruments

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Gyroscopic artificial horizon

Geometrical instruments – Indicator of direction of force traversing natural media – Gyroscopically controlled or stabilized
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Method of and apparatus for indicating the geographical position

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
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Profile ID: LFUS-PAI-P-803974

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