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Grooved piston
D621036 Grooved piston
Patent Drawings:Drawing: D621036-2    
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(1 images)

Inventor: Maxa, et al.
Date Issued: August 3, 2010
Application: D/341,355
Filed: August 4, 2009
Inventors: Maxa; Steven J. (Burnsville, MN)
Cernohous; Adam J. (River Falls, WI)
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Primary Examiner: Nelson; T. Chase
Assistant Examiner: Goodman; Eric L
Attorney Or Agent: Soo; Philip P.
U.S. Class: D24/130
Field Of Search: D24/112; D24/114; D24/127; D24/128; D24/129; D24/130; 206/363; 206/364; 206/367; 604/54; 604/110; 604/192; 604/263; 604/295
International Class: 2402
U.S Patent Documents:
Foreign Patent Documents: 1475430
Other References:

Claim: CLAIM The ornamental design for a grooved piston, as shown and described.
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.

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