Filtering face-piece respirator support structure
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Description
The broken line showing forms no part of the claimed design.
Claims
The ornamental design for a filtering face-piece respirator support structure, as shown and described.
Referenced Cited
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Patent History
Patent number: D657449
Type: Grant
Filed: Sep 20, 2007
Date of Patent: Apr 10, 2012
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Erik J. Johnson (St. Paul, MN), Thomas G. Skulley (St. Paul, MN), Michael K. Domroese (Woodbury, MN)
Primary Examiner: Ian Simmons
Assistant Examiner: Charles Hanson
Attorney: Karl G. Hanson
Application Number: 29/295,021
Type: Grant
Filed: Sep 20, 2007
Date of Patent: Apr 10, 2012
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Erik J. Johnson (St. Paul, MN), Thomas G. Skulley (St. Paul, MN), Michael K. Domroese (Woodbury, MN)
Primary Examiner: Ian Simmons
Assistant Examiner: Charles Hanson
Attorney: Karl G. Hanson
Application Number: 29/295,021
Classifications
Current U.S. Class:
Mask (D24/110.1)