End and encoded mass distributable response piece and method of making the same
US5137304A · kind A · utility
39Cited by
5References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2301/4311
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of simultaneously encoding successive groups of printed paper sheets or mass distributable material wherein the sheets are provided with unperceptable and virtually invisible common code pattern by laser means which is supplied with a distinct series of coded pulse signals in synchronism with control pulses to produce a different optically-scannable coded hole pattern on each group of printed sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.