Pencil-sharpening device
US7934319B2 · kind B2 · utility
6Cited by
149References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2006 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Aug 8, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention is directed to a pencil-sharpening device having a titanium chromium nitride coating disposed on the cutting blade of the device. The titanium chromium nitride coating is metallurgically bonded to the steel blade. The coated blade provides enhanced properties for the pencil-sharpening device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.