Retracing steps
US10408623B2 · kind B2 · utility
2Cited by
19References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2009 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/1656
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques for creating breadcrumbs for a trail of activity are described. The trail of activity may be created by recording movement information based on inferred actions of walking, not walking, or changing floor levels. The movement information may be recorded with an accelerometer and a pressure sensor. A representation of a list of breadcrumbs may be visually displayed on a user interface of a mobile device, in a reverse order to retrace steps. In some implementations, a compass may additionally or alternatively be used to collect directional information relative to the earth's magnetic poles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.