Notebook insert with calculator and holepunch
US5209592A · kind A · utility
22Cited by
6References
6Claims
0Family size
Inventor
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D5/006
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A notebook insert comprises a housing, an electronic calculator attached to the housing and a holepunch assembly also attached to the housing. The housing has a periphery with multiple holes therethrough which are spaced to be adapted for engagement with the rings of a ringed notebook. The housing, electronic calculator, and holepunch assembly are sufficiently thin for convenient use of the notebook insert in a ringed notebook.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.