Computer trackball

• US D342,241 S
• Filed: 03/08/1991
• Issued: 12/14/1993
• Est. Priority Date: 03/08/1991
• Status: Expired due to Term

• Current Assignee: Microsoft Corporation
• Original Assignee: Microsoft Corporation
• Inventors: Bradley, Paul, Yurchenco, James R., Nelson, Michael D., Stephan, Allan H., Paull, Mike M., Garthwaite, Charlie, Fulton, Elinor J., Ashmun, Stuart, Cameron, Bridget
• Primary Examiner(s): Burke, Wallace R.
• Assistant Examiner(s): TUNG, MELANIE H
• Application Number:
  US07/665,840
• Time in Patent Office: 1,012 Days
• Field of Search: D14/100, D14/114, D13/158, D21/48, 178/18-19, 200/5 R, 200/5 A, 200/6 R, 200/6 A, 213/148 B, 273/148 B, 340/707, 340/709-710, 74/471 XY
• US Class Current: D14/417
• CPC Class Codes: N/A

Claims

1. The ornamental design for a computer trackball, as shown and described.