Ticket and method of metering the use of a facility
US6402040B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Dec 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B11/11
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A ticket including a base member, a discolorable member carried by the base member, and a discoloration system carried by the base member. The discoloration system is initially configured such that the discoloration system selectively discolors a first predetermined portion of the discolorable member in response to the application of a first energy pulse without discoloring a second predetermined portion of the discolorable member. The discoloration system is also adapted to be reconfigured by the first energy pulse such that the second predetermined portion of the discolorable member will be discolored in response to the application of a second energy pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.