(12) United States Design Patent ao) Patent No.: Us D62i,930 S
Maxaetal. (45) Date of Patent: ** *Aug. 17, 2010
(54) GROOVED PISTON
(75) Inventors: Steven J. Maxa, Burnsville, MN (US);
Adam J. Cernohous, River Falls, WI
(US)
(73) Assignee: 3M Innovative Properties Company,
St. Paul, MN (US)
( * ) Notice: This patent is subject to a terminal disclaimer.
(**) Term: 14 Years
(21) Appl.No.: 29/341,356
(22) Filed: Aug. 4, 2009
(51) LOC(9)Cl 24-02
(52) U.S. CI D24/130
(58) Field of Classification Search D24/112,
D24/114, 127-130; 206/363-364,367; 604/54, 604/110, 192, 263, 295 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
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7,128,246 B2 10/2006 Raiaetal.
D581,528 S * 11/2008 Sudo D24/130
D583,938 S * 12/2008 Sudo D24/130
7,503,905 B2 3/2009 Jessopetal.
7,547,297 B2 * 6/2009 Brinkhues 604/199
2002/0077598 Al * 6/2002 Yap et al 604/155
2003/0233075 Al * 12/2003 Huegli 604/222
2005/0137533 Al* 6/2005 Sudo et al 604/218
2006/0178643 Al * 8/2006 Sudo et al 604/230
2007/0078406 Al * 4/2007 Lee 604/198
2007/0078407 Al * 4/2007 Huang 604/198
2007/0167910 Al * 7/2007 Tennican et al 604/110
2007/0250004 Al* 10/2007 Tung 604/110
2008/0097387 Al* 4/2008 Spector 604/512
2008/0154192 Al* 6/2008 Schraga 604/110
FOREIGN PATENT DOCUMENTS GB 1 475 430 6/1977
* cited by examiner
Primary Examiner—T. Chase Nelson
Assistant Examiner—Eric L Goodman
(74) Attorney, Agent, or Firm—Philip P. Soo
