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:
Apr. 24, 2001
Filed:
Nov. 30, 1998
Applicant:
Inventors:
Lord Nigel Featherston, Redmond, WA (US);
Charles Salvatore Mauro, Jr., Woodinville, WA (US);
Mark R. Lee, Seattle, WA (US);
Assignee:
Microsoft Corporation, Redmond, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/34 ; G09G 5/08 ;
U.S. Cl.
CPC ...
G01D 5/34 ; G09G 5/08 ;
Abstract
Sampling of a phototransistor in an optical encoding system is controlled by “turning on” the phototransistor, after light has already charged the base of the phototransistor at least somewhat, by applying a potential difference across the collector and emitter of the phototransistor, producing an essentially instantaneous emitter response, which is then sampled.