4. Electrical audio signal processing systems and devices
  5. One-way audio signal program distribution
  6. Public address system

Mark W. Nelson

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Apparatus for automatic speech recognition

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent

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Biological soil detector

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or...
Reexamination Certificate

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Cleaning pad

Washing – cleaning – or drying machine – Laundering – cleaning – or drying tools or implements – Scraper – duster – mop – or sponge
Design Patent

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Cleaning tool

Brushing – scrubbing – and general cleaning – Implements – Fabric
Reexamination Certificate

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Floor cleaning device

Washing – cleaning – or drying machine – Laundering – cleaning – or drying tools or implements – Scraper – duster – mop – or sponge
Design Patent

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Profile ID: LFUS-PAI-P-1576637

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