4. Communications: electrical
  5. Systems
  6. Call station

Francis E. Ferrari

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Bulb outage warning system

Communications: electrical – Digital comparator systems
Patent

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Bulb outage warning system

Communications: electrical – Systems – Call station
Patent

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Pattern tracer with kerf dependent control for improved cornerin

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent

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Pattern tracer with variable effective forward offset and method

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent

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Vehicle alarm

Communications: electrical – Audible indication – Ultrasonic pest control
Patent

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Profile ID: LFUS-PAI-P-224627

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