Snap on device for hardcover ring binder
US4569613A · kind A · utility
32Cited by
9References
14Claims
0Family size
Inventor
Key dates
| Filing date | Feb 6, 1984 |
| Grant date | Feb 11, 1986 |
| Priority date | — |
| Expiry date | Feb 6, 2004 |
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 pair of arcuate footers in the channel of the U-shaped support and a pair of grippers on each side of the U-shaped support adjacent the arcuate footers 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.