4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Telephone equipment

Waldemar Ollik

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Electrical contacting method

Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate

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Fire detection method and fire detector therefor

Optics: measuring and testing – By particle light scattering – With photocell detection
Reexamination Certificate

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Fire detector device

Optics: measuring and testing – By particle light scattering – With photocell detection
Reexamination Certificate

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Manual call point

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Design Patent

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Method and apparatus for marking an escape route

Communications: electrical – Systems – Manual alarm telegraph; e.g. – other than signal box type
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2646443

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