System for altering elements of a text file to mark documents
US5388194A · kind A · utility
20Cited by
6References
15Claims
0Family size
Inventor
Key dates
| Filing date | Jul 24, 1990 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Jul 24, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09C5/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for generating documents. A text file representing a document is encoded using a marking code. This marking code is encoded into the document by altering elements of the contents of the text file. Preferably the spaces between words are altered to be short and long spaces. The marked version therefore indicates, in an encoded fashion, the marking code that is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.