Filament spool
Claims
The ornamental design for a filament spool, as shown.
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Type: Grant
Filed: Aug 29, 2014
Date of Patent: Oct 6, 2015
Inventors: Michael Daniel Armani (Dayto, MD), Syed Hamidur Rahman (Bethesda, MD)
Primary Examiner: Robert M Spear
Assistant Examiner: Eliza Bennett-Hattan
Application Number: 29/501,040