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US Patent 11889969 Surface cleaning apparatus

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Is a

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Patent attributes

Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Wayne Ernest Conrad0

Date of Patent

February 6, 2024

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Patent Application Number

171496720

Date Filed

January 14, 2021

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Patent Citations

US Patent 7159270 Vacuum cleaner adapters and assemblies including the same

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US Patent 6891355 Method for computing an amount of energy taken from a battery

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US Patent 6909266 METHOD OF REGULATING AN OUTPUT VOLTAGE OF A POWER CONVERTER BY CALCULATING A CURRENT VALUE TO BE APPLIED TO AN INDUCTOR DURING A TIME INTERVAL IMMEDIATELY FOLLOWING A VOLTAGE SENSING TIME INTERVAL AND VARYING A DUTY CYCLE OF A SWITCH DURING THE TIME INTERVAL FOLLOWING THE VOLTAGE SENSING TIME INTERVAL

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US Patent 7135051 Dirt cup filter with pre-filtration cap

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US Patent 7163568 Bagless dustcup

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US Patent 7171724 Multifunctional electric cleaning apparatus

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US Patent 7291193 Cyclone dust collector and vacuum cleaner therewith

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US Patent 7370387 Hand-holdable vacuum cleaners

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Patent Primary Examiner

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CPC Code

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Patent abstract

A stick surface cleaning apparatus has a cyclone unit provided in the wand.

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