4. Ships
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  6. Tension relievers

Robert D. Isaak

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Doppler compensator for heterodyne correlation devices

Communications – electrical: acoustic wave systems and devices – Receiver circuitry
Patent

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Encoded echo-ranging signal generator

Communications: electrical – Selective – Monitoring in addition to control
Patent

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Secure communication keying system

Cryptography – Cryptanalysis
Patent

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Secure communication system

Pulse or digital communications – Repeaters – Testing
Patent

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Secure sonar communication system

Communications – electrical: acoustic wave systems and devices – Underwater system – Telemetering
Patent

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Profile ID: LFUS-PAI-P-744029

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