4. Electrical audio signal processing systems and devices
  5. Including amplitude or volume control

Yoshihiro Kawauchi

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Amusement ride for traveling down a water chute with reduced spl

Railways – Amusement – Chutes
Patent

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Digital button telephone system and extension terminal for...

Telephonic communications – Multi-line or key substation system with selective switching...
Reexamination Certificate

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Digital key telephone system and extension terminal device...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
Reexamination Certificate

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Digital key telephone system and extension terminal device...

Telephonic communications – Multi-line or key substation system with selective switching... – Switching or supervision feature
Reexamination Certificate

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Digital key telephone system and extension terminal device...

Telephonic communications – Multi-line or key substation system with selective switching... – Detail of hold circuitry
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1072332

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