4. Electrical transmission or interconnection systems
  5. Personnel safety or limit control features
  6. Interlock

Robert Roger Cordell

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High speed tone decoder utilizing a phase-locked loop

Oscillators – Automatic frequency stabilization using a phase or frequency... – With intermittent comparison controls
Patent

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Optical receiver particularly useful for a multi-wavelength...

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate

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System and method for achieving extended low-frequency...

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Reexamination Certificate

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Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent

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Profile ID: LFUS-PAI-P-1536734

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