4. Communications: radio wave antennas
  5. Antennas
  6. Waterborne

David A. Tonn

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Digital antenna goniometer and method

Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate

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Displacement current method and apparatus for remote...

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Reexamination Certificate

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Evanescent waveguide apparatus and method for measurement of...

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Reexamination Certificate

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Microstrip patch antenna with progressive slot loading

Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate

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Omni-azimuthal pattern generator for VLF and LF communication

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
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Profile ID: LFUS-PAI-P-2299292

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