Sales records
US4957312A · kind A · utility
9Cited by
21References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D15/0053
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Sales records comprising alphanumeric characters that are resistant to counterfeiting can be made by printing different parts of at least some of the characters making up the record in a plurality of colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.