Tab. 3.
| Company Name | Technology | Description | (Country) Patent Number |
|---|---|---|---|
| Microsoft Corporation | Labels using randomly-occurring features | Pattern unique to each label | (US) 7,878,398 |
| Axsun Technologies | Taggants read using Raman spectroscopy | Can be made unreadable by chemical modification | (US) 7,875,457 |
| CSEM SA (Centre Suisse d’Electronique et de Microtechnique) (Swiss firm) | Zero-order diffractive pigments (ZOPs) | Produce very pronounced colours that can’t be copied | (US) 7,864,424 |
| AlpVision (Swiss firm) | Cryptoglyph invisible marking technology | Invisible signature on package | (India) 243454 (Indonesia) P0025514B |
| PANalytical BV (Dutch firm) | Use of angle-dispersive X-ray diffraction | Compared to reference signatures in data library | (US) 7,756,248 |