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:
Mar. 21, 1989
Filed:
Apr. 30, 1987
Applicant:
Inventors:
James P Johnston, Westford, MA (US);
Donald L Russell, Chelmsford, MA (US);
Assignee:
Wang Laboratories, Inc., Lowell, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340784 ; 340706 ; 340707 ; 340712 ; 178 18 ;
Abstract
A device for both entering and displaying information includes imaging circuitry in which a plurality of elements each has a visual characteristic which is visible at a writing surface and which depends on electrically stimulating the element via conductive circuitry, the imaging circuitry is arranged to produce electrical manifestations at the conductive circuitry in response to writing stimuli, and the device also includes control circuitry which delivers electrical signals to the conductive circuitry to form an image and converts the electrical manifestations into digital form.