4. Measuring and testing
  5. Navigation
  6. Ship's log

Robert K. Jeffers

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Acoustic deterrent system and method

Communications – electrical: acoustic wave systems and devices – Transmitter systems – Animal control
Patent

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Guided flow marine speedometer including angularly shaped housin

Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent

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Marine instrument

Measuring and testing – Navigation – Ship's log
Patent

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Marine instrument

Measuring and testing – Navigation – Ship's log
Patent

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Masthead control system

Ships – Spars – Masts and masting
Reexamination Certificate

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Profile ID: LFUS-PAI-P-218223

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