Engraved image identification card with opaque cover layer
US4451068A · kind A · utility
8Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1981 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Dec 14, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/904
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An engraved image identification card has a translucent planar base member with a multiplicity of engraved scores extending into one of its surfaces with an opaque layer positioned adjacent either the engraved side of the translucent member or the non-engraved side of the translucent member opposite the engraved side to provide enhancement of the contrast between the engraved and non-engraved regions in the translucent member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.