4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

William K. Logsdon

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Audio signal generator

Communications: electrical – Audible indication – Ultrasonic pest control
Patent

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Caller ID telephone security device

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent

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Dual pressure change intrusion detector

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Pressure change intrusion detector

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Pressure change intrusion detector

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Profile ID: LFUS-PAI-P-539120

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