Grooved piston

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Description

FIG. 1 is a perspective view of a top perspective view showing the new design for a grooved piston;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

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
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Patent History
Patent number: D621930
Type: Grant
Filed: Aug 4, 2009
Date of Patent: Aug 17, 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: 29/341,356
Classifications
Current U.S. Class: Syringe, Catheter Or Needle Component (22) (D24/130)