Document holders
US4445799A · kind A · utility
31Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1981 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Feb 12, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42F15/0064
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A document holder for releasably binding together loose-leaf stationery items and securing them to either single- or double-rail suspension filing systems is provided by a loose-leaf binder which incorporates a thin external spine structure incorporating at least one hook suitable for suspending the binder from single-rail suspension systems and retractable head- and tail-end hooks suitable for use with double-rail suspension systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.