Trackball

- Logitech, Inc.
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Description

FIG. 1 is a rear elevational view of a trackball showing our new design.

FIG. 2 is a top plan view thereof,

FIG. 3 is a right side elevational view thereof,

FIG. 4 is a top, front, right side perspective view thereof on an enlarged scale.

FIG. 5 is a left side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D276247 November 6, 1984 Kim
D301256 May 23, 1989 Iwata
4538476 September 3, 1985 Luque
Other references
  • Creative Computing, Jan. 1984, The Robo Stick, top of page.
Patent History
Patent number: D320199
Type: Grant
Filed: Dec 8, 1989
Date of Patent: Sep 24, 1991
Assignee: Logitech, Inc. (Fremont, CA)
Inventors: Kanae Koh (San Francisco, CA), Josef Bismanovsky (Mountain View, CA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Freda S. Nunn
Law Firm: Harrison & Eakin
Application Number: 7/447,701
Classifications
Current U.S. Class: D14/114