4. Apparel
  5. Guard or protector
  6. For wearer's head

Timothy J. Sopko

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Helmet with an alarm

Apparel – Guard or protector – For wearer's head
Patent

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Microphone circuit control mechanism for breathing apparatus

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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Weather resistant sound attenuating modular communications...

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

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Profile ID: LFUS-PAI-P-362635

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