Snap on device for hardcover ring binder
US4524991A · kind A · utility
18Cited by
3References
20Claims
0Family size
Inventor
Key dates
| Filing date | Jun 27, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Jun 27, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S402/502
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The snap on device having a U-shaped support with a spacer bar secured down the channel of the U-shaped support and a tension strip secured to the spacer bar and substantially filling the channel creates a device capable of being snapped onto a hard cover ring binder and equalizing the thickness of the binder from its spine to its opening side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.