Method and apparatus for classifying documents
US5414781A · kind A · utility
21Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Nov 24, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J21/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for identifying documents and classes of documents. The documents are provided with distinctive logotypes which are preferably at the top of each document. The coding of the logotypes is by the use of distinctive angular alignments in the logotype. The logotype is scanned at different angles in order to determine angular "signatures" for comparison with a predetermined power distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.