Pivot knob ring for a welding helmet
Latest 3M Innovative Properties Company Patents:
Description
The broken lines showing of a welding helmet form no part of the claimed design.
Claims
The ornamental design for a pivot knob ring for a welding helmet, as shown and described.
Referenced Cited
U.S. Patent Documents
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Patent History
Patent number: D835353
Type: Grant
Filed: Apr 3, 2018
Date of Patent: Dec 4, 2018
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Martin A. J. M. Berggren (Tällberg), Oskar E. Juhlin (Gustavsberg)
Primary Examiner: Robert A Delehanty
Application Number: 29/642,933
Type: Grant
Filed: Apr 3, 2018
Date of Patent: Dec 4, 2018
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Martin A. J. M. Berggren (Tällberg), Oskar E. Juhlin (Gustavsberg)
Primary Examiner: Robert A Delehanty
Application Number: 29/642,933
Classifications
Current U.S. Class:
Element Or Attachment (D29/122)