Inspection chip for sensor measuring instrument
US6792791B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 12, 2001 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Dec 12, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/00772
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A check chip of the present invention employed at a usage of a sensor measuring device is provided with a structural characterizing portion of a convex shape, concave shape or a penetration hole at a location, by which a user is considered to pick up, and the state of the structural characterizing portion is made to be different from that of a structural characterizing portion provided on a correction chip which is similar to the check chip, in a size, the number of the structural characterizing portions, or placement location.According to the check chip constructed as above, the difference from the correction chip can be easily identified even by a visually handicapped person or a weak-sighted person, according to the difference in the structural characterizing portion, from the touch, thereby preventing the person from using the check chip and the correction chip with confused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.