Track ball
United States Patent D350736

Takahashi, Masaki (Kawasaki, JP)
Inukai, Yoshinori (Tokyo, JP)
Application Number:
Publication Date:
Filing Date:
Canon Kabushiki Kaisha (Tokyo, JP)
Primary Class:
Field of Search:
178/18-19, 200/5R, 200/5A, 200/6R, 200/6A, 273/148B, 74/471XY, 345/156-167, D14/100, D14/114, D13/158, D21/48, D19/41-51
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US Patent References:
D340042Handheld computer pointing deviceOctober, 1993Copper et al.D14/114
D340706Pen mouseOctober, 1993HuD14/114
D336747Mouse for a computerJune, 1993ChaoD14/114
D332446Mouse penJanuary, 1993LinD14/114
D316253Electronic sensor penApril, 1991Riddiford et al.D14/114

Primary Examiner:
Burke, Wallace R.
Assistant Examiner:
Tung M. H.
Attorney, Agent or Firm:
Fitzpatrick, Cella, Harper & Scinto
1. The ornamental design for a track ball, as shown and described.


FIG. 1 is a front elevational view of a track ball showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof, the right side is a mirror image; and,

FIG. 6 is a perspective view thereof.