4. Telecommunications
  5. Radiotelephone system
  6. Emergency or alarm communication

Joseph Birli

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Communications device for a protective helmet

Telecommunications – Radiotelephone system – Emergency or alarm communication
Reexamination Certificate

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Dual microphone assembly for mask

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate

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Lapel microphone with push to talk switch

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate

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Wireless communication systems for masks or helmets

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate

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Wireless heads-up display for a self-contained breathing...

Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2947572

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