U.S. Patent number: 3,987,685
Filed: Dec. 16, 1974
Issued: Oct. 26, 1976
Inventor: Willard J. Opocensky
Assignee: Xerox Corporation
A year after Xerox filed their first patent for a mouse using a transport sphere, the company and inventor Willard J. Opocensky filed for a patent that improved upon the design. The new mouse would replace the position wheels with "rotatable shafts" that would measure the sphere's movement.
Image taken from U.S. Patent 3,987,685 - Digitized by Google
Computer mouse evolution: Patent designs from the 1970s and 1980s
by Bill Detwiler | June 18, 2010, 10:43am PDT | Image 5 of 31
Cursor position device - Internal
Cursor position device - Internal - Image 5 of 31
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About Bill Detwiler
Bill Detwiler is Head Technology Editor of TechRepublic. Previously, he worked as a Support Tech and IT Manager in the social research and energy industries.
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RE: X-Y Position Indicator For A Display System (Computer mouse evolution: Patent designs from the 1970s and 1980s)
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