4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Optical or pre-photocell system

Hermann Haberer

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Circuit for checking a tristate detection circuit

Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital logic testing
Reexamination Certificate

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Light grid

Optics: measuring and testing – Shape or surface configuration
Reexamination Certificate

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Method for monitoring an entrance to a hazardous area

Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate

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Photoelectric barrier and method for operation

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

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Safety switch arrangement

Electricity: electrical systems and devices – Safety and protection of systems and devices – Feeder protection in distribution networks
Patent

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Profile ID: LFUS-PAI-P-469430

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