Device for simultaneous creation and detection of markings
US4475240A · kind A · utility
39Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1981 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Nov 9, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Device for simultaneous generation and detection of markings (e.g. handwriting) comprising at least one marking member and at least one optical sensor, which is arranged to sense at least one optical property of the surface on which the marking is being made, the marking member being arranged to change said at least one property of the surface on which the marking is made, said optical sensor being arranged to sense the direction of said marking relative to the orientation of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.