Apparatus for and method for marking objects, objects marked thereby and apparatus and method of reading marked objects
US6616051B1 · kind B1 · utility
4Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2000 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Apr 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21G4/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus for marking objects is disclosed. The apparatus comprises (a) a source device including a mother isotope for emitting daughter isotopes by radioactive decay; preferably (b) a positioning mechanism for positioning an object in close proximity to the source device; and (c) a patterning mechanism for restricting implantation of the daughter isotopes into a surface of the object, so as to create a detectable pattern of the daughter isotopes on the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.