Method and apparatus for capturing handwritten information and providing visual feedback
US5401916A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1992 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Sep 29, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/033
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for electronically capturing handwritten information and for providing a visual feedback to the user of the device to show what has been written. A digitizer is provided for the electronic capture of the handwritten data, and a device comprising multiple superimposed sheets, which coact to produce a visible mark when pressure is applied thereto, is placed over the digitizer to receive a writing impression at the same time that the digitizer does. A mechanical eraser is placed between the sheets to separate them and thereby erase the visible mark which has been made. The eraser also includes a sensing device to sense when an erasure has been made, and to provide a signal indicating that this has been done. In using the device, it is first ascertained that any previous marking has been erased, the desired handwritten entry is then made, and is subsequently erased, to ready the device for its next use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.