User identification system and vehicular portable device
K Sanji, N Hirao, S Matsushita, T Sekizawa… - US Patent …, 2019 - Google Patents
A user identification system is provided, which includes an in-vehicle apparatus used by
multiple users and a vehicular portable device carried by a user acting as a driver and …
multiple users and a vehicular portable device carried by a user acting as a driver and …
Orientation method, device, and system
X Zhang, Y Zhang - US Patent 10,412,549, 2019 - Google Patents
A method includes: determining a reference direction for orientation; when a first device
rotates around an obstruction, receiving a wireless signal sent by a second device, and …
rotates around an obstruction, receiving a wireless signal sent by a second device, and …