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

Digital Products Corporation

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Automatic personnel monitoring system

Telephonic communications – Emergency or alarm communications – Personal monitoring
Patent

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Drive-by personnel monitoring system with radio link

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent

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Electronic coin detection apparatus

Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent

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Gaming apparatus with color sensitive detector

Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent

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Gaming device using visible randomization

Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
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Profile ID: LFUS-PAI-P-108925

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