U.S. Patent number: 4,578,674
Filed: Apr. 20, 1983
Issued: Mar. 25, 1986
Inventor: Baker et al.
Asignee: International Business Machines Corporation
By the mid-1980s it was time for the computer mouse to lose its tail. Inventors David C. Baker, David F. Bantz, and Gregory A. Flurry designed an interesting mouse and control base system. Instead of a mechanism inside the mouse body measuring the mouse motion and transmitting that information to the receiver, their system would transmit and receive ultrasonic or infrared signals between the mouse and control base. The mouse' initial location and movement would be calculated by measuring the Doppler shift of the signals.
Image taken from U.S. Patent 4,578,674 - Digitized by Google
Computer mouse evolution: Patent designs from the 1970s and 1980s
by Bill Detwiler | June 18, 2010, 10:43am PDT | Image 21 of 31
Method And Apparatus For Wireless Cursor Position Control
Method And Apparatus For Wireless Cursor Position Control - Image 21 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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