Computer display with two-part cursor for indicating loci of operation
US4806916A · kind A · utility
7Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for creating and modifying strings of symbols in a computer storage apparatus includes a two-part cursor for guiding the operator. One cursor part indicates the exact location where entered symbols will be inserted. A second cursor part highlights a selected substring which is the object of certain commands, such as the delete command. Internally, the system provides memory management techniques for inserting and deleting symbols in response to operator commands. The display, including the two-part cursor, is derived from the memory contents with the aid of pointers, tables, and state variables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.