Condition responsive indication assembly
US11000088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2020 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Apr 2, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/016
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for alerting a user of a first portable communications assembly that another user of a second portable communications assembly is within a predetermined distance includes the step of receiving a distance signal transmitted by the transmitter in the second portable communications assembly. A distance between the first and second portable communications assemblies based on the distance signal is calculated based on the strength of the distance signal or based on a time stamp embedded in the distance signal. An alert is emitted when the distance calculated between the first and second portable communications assemblies is less than the predetermined distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.