Electronic key system
US11351962B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Oct 25, 2017 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Oct 25, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2325/108
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic key system determines that legitimate communication has been performed on the basis of conditions including that a measured distance from a ranging request unit to a ranging response unit measured on the basis of a ranging request signal and a ranging response signal is within a threshold range that is set on the basis of the distance from a communication area of a transmission antenna where an electronic key is determined to be located by a key location determination unit to one of either the ranging request unit or the ranging response unit that is provided in an on-board device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.