The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 1994
Filed:
Oct. 05, 1992
Marc Bidiville, Pully, CH;
Javier Arreguit, Pully, CH;
Floris A Van Shaik, Colombier, CH;
Bernard Steenis, Bevaix, CH;
Fabien Droz-Dit-Busset, Neuchatel, CH;
Harthmuth Buczek, Marin-Epagnier, CH;
Aldo Bussien, Aclens, CH;
Logitech, Inc., Fremont, CA (US);
Abstract
A cursor control device for personal computers and workstations includes a randomly speckled ball illuminated with diffuse lighting. An image of at least a portion of the illuminated area of the speckled ball is focused by an optical element such as a diffractive optical element onto a photosensitive array. Logic associated with the photosensitive array determines movement of the ball across the array, and translates that movement into conventional cursor control signals supplied to a host system.