Photochromic optically keyed dispenser
US8071933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Jun 2, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K5/1217
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A removable and replaceable keying component which is required for operation of a mechanism and which component includes a waveguide having a photochromic portion. A method of controlling operation of a mechanism, preferably a dispenser, having a removable component having the steps of measuring electromagnetic radiation passing through a waveguide carrying at least in part on the removable component and permitting operation of the mechanism only when the measured electromagnetic radiation corresponds with one or more pre-selected parameters. Preferably, the method involves directing emitted electromagnetic radiation with pre-selected input parameters selected from a plurality of input parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.