US D1,057,296 S
Air supply attachment for a helmet
Benjamin A. Johnson, Woodbury, MN (US); Paul A. Martinson, Maplewood, MN (US); Garry J. Walker, Stockton-on-Tees (GB); David J. Schmidt, Lake Elmo, MN (US); and David L. Ausen, Eagan, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Apr. 1, 2022, as Appl. No. 29/833,189.
Term of patent 15 Years
LOC (15) Cl. 02 - 99
U.S. Cl. D29—122
OG exemplary drawing
 
The ornamental design for an air supply attachment for a helmet as shown and described.