US Patent 11744421 Surface cleaning apparatus
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US Patent 11744421 Surface cleaning apparatus
Article
A surface cleaning apparatus includes first and second pre-motor filters that are in parallel.
Infobox
Is a
Patent Jurisdiction
Patent Number
11744421
Patent Inventor Names
Wayne Ernest Conrad
Date of Patent
September 5, 2023
Patent Application Number
17154310
Date Filed
January 21, 2021
Patent Citations
Patent Primary Examiner
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