Marking system
US4976456A · kind A · utility
14Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1988 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Sep 28, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A label formed of a plastic film having a mottled background on its lower surface, which is covered by a layer of adhesive and a backing strip. The label has an invisible identifier on its upper surface which becomes visible when a marking pen is applied to it and the excess material around the identifier is wiped away.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.