4. Optics: measuring and testing
  5. Velocity or velocity/height measuring
  6. With light detector

Envirotest Systems Corporation

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Remote emissions sensing system and method with a composite...

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate

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Speed and acceleration monitoring device using visible laser bea

Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
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Vehicular running loss detecting system

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Reexamination Certificate

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