Cursor control circuit for plural displays for use in a word processing system

Patent 4434419 Issued on February 28, 1984. Estimated Expiration Date:

February 28, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3166636

3868673

Display apparatus having improved cursor enhancement
Patent #: 3967266
Issued on: 06/29/1976
Inventor: Roy

Intermixed pitches in a buffered printer
Patent #: 3999168
Issued on: 12/21/1976
Inventor: Findley , et al.

Hand-held interactive terminal
Patent #: 4007443
Issued on: 02/08/1977
Inventor: Bromberg , et al.

Nondestructive cursors in AC plasma displays
Patent #: 4063223
Issued on: 12/13/1977
Inventor: Schlig , et al.

Method and apparatus for verification of displayed characters
Patent #: 4224614
Issued on: 09/23/1980
Inventor: DevChoudhury

CRT Display apparatus with changeable cursor indicia Patent #: 4228430
Issued on: 10/14/1980
Inventor: Iwamura , et al.

Inventors

Assignee

Pitney Bowes Inc.

Application

No. 06/177328 filed on 08/12/1980

US Classes:

345/2.2, Presentation of similar images345/157, Cursor mark position control device400/83DISPLAYING TYPEWRITER-FORMED REPRESENTATION OF PRINT-LINE

Examiners

Primary: Curtis, Marshall M.

Attorney, Agent or Firm

International Classes

G06F 3/14 (20060101)
G09G 5/08 (20060101)

Abstract

A cursor control system provided for word processing apparatus of the type having a keyboard for entering alphanumeric data and including two displays. A first display displays a plurality of lines of text. A first display control circuit is coupled between the keyboard and first display and includes a first cursor control circuit for causing visual marking of a predetermined number of characters to be exhibited on the first display. The cursor control circuit is actuated by the keyboard. A second display control circuit includes a second cursor control circuit for causing visual marking on the second display of those marked characters on the first display which are also exhibited on the second display.