Title:
Trackball for computer system monitor
United States Patent D328458


Inventors:
Barry, Timothy C. (Fremont, CA)
Application Number:
07/507057
Publication Date:
08/04/1992
Filing Date:
04/09/1990
Assignee:
Microspeed Inc. (Fremont, CA)
Primary Class:
Field of Search:
D14/100, D14/114, D21/48, D13/158, D13/199, 340/700, 340/706, 340/707, 340/710-712, 341/22, 341/23, 178/18, 178/19, 273/148B, 74/471XY, 200/5A, 200/5R, 200/6A, 200/6R, 250/221
View Patent Images:
US Patent References:
D313589Hand operated computer display controlJanuary, 1991Martinelli et al.D14/114
D304447Housing for movable cursor control for a video displayNovember, 1989Adams et al.D14/114
D292600Track ball unitNovember, 1987WagnerD14/114
D291318Combined trackball and mouseAugust, 1987KimD14/114
D288930Computer mouseMarch, 1987Barbera et al.D14/114
D283818Cursor for computer display terminalMay, 1986SkaggsD14/114



Primary Examiner:
NUNN, FREDA S
Attorney, Agent or Firm:
WALTER J. MADDEN, JR. (SKJERVEN, MORRILL, MAC PHERSON, FRANKLIN AND FRIEL 25 METRO DRIVE, SUITE 700, SAN JOSE, CA, 95110, US)
Claims:
1. The ornamental design for a trackball for computer system monitor, as shownand described.

Description:

FIG. 1 is a top front and side perspective view of a trackball for computer system showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIGS. 6 and 7 are, respectively, right and left side elevational views thereof.