US D997,345 S
Tensioning device for a face mask
Steven J. Gordon, Weston, MA (US); and Chulho Hyun, Vancouver (CA)
Assigned to Katharos Laboratories, LLC, Boston, MA (US)
Filed by Steven J. Gordon, Weston, MA (US); and Chulho Hyun, Vancouver (CA)
Filed on Jan. 27, 2021, as Appl. No. 29/768,151.
Term of patent 15 Years
LOC (14) Cl. 29 - 02
U.S. Cl. D24—110.1
OG exemplary drawing
 
The ornamental design for a tensioning device for a face mask, as shown and described.