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:
Dec. 04, 2001
Filed:
Aug. 24, 1998
Applicant:
Inventors:
Denny Jaeger, Oakland, CA (US);
Kenneth M. Twain, Oakland, CA (US);
Assignee:
Intertactile Technologies Corporation, Oakland, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 5/00 ;
U.S. Cl.
CPC ...
G09G 5/00 ;
Abstract
A control device provides a variable control signal to electrical apparatus and has a control member, such as a stylus or a turnable or slidable member, that is manipulated to vary the signal. Photoelectric sensors detect and track movement of the control member. The control member is disposed at the face of an electronic image display screen which can display calibration marks, identifying labels, current setting and/or other graphics pertinent to operation of the control device. The display screen also operates as the light source for the photoelectric sensors.