4. Telephonic communications
  5. Supervisory or control line signaling
  6. Signal reception at substation

Kiyoshi Hama

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Adaptive ringer for telephone terminal

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Patent

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Area sensor with optical axis having narrow angular...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Display monitor for multi-optical-path photoelectric safety...

Communications: electrical – Visual indication – Lighted alphanumeric or character indicator matrix
Reexamination Certificate

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Split-flow-type flow sensor device

Measuring and testing – Volume or rate of flow – Proportional
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1093846

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