Grooved piston
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Description
The portions of the grooved piston shown in broken lines form no part of the claimed design.
Claims
The ornamental design for a grooved piston, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
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Patent History
Patent number: D621036
Type: Grant
Filed: Aug 4, 2009
Date of Patent: Aug 3, 2010
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Steven J. Maxa (Burnsville, MN), Adam J. Cernohous (River Falls, WI)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Eric L Goodman
Attorney: Philip P. Soo
Application Number: 29/341,355
Type: Grant
Filed: Aug 4, 2009
Date of Patent: Aug 3, 2010
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Steven J. Maxa (Burnsville, MN), Adam J. Cernohous (River Falls, WI)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Eric L Goodman
Attorney: Philip P. Soo
Application Number: 29/341,355
Classifications
Current U.S. Class:
Syringe, Catheter Or Needle Component (22) (D24/130)