What is the meaning of these strange symbols at the right of USB3.0 symbol (the "+" and the "oval")

[Nowhere_man]

What is the meaning of these strange symbols at the right of USB 3.0 mark (the "+" and the "oval")? 

[Dragon-Fur]

@Nowhere_man 

The extra tiny icons add definitions / description to the port type:

Super Speed Powered Port for USB + powered port

Maintenance and Service Guide

See the illustration on Page 9

Item (2)
USB Super Speed powered port
Connects and supplies power to a USB device, such as a cell phone, camera, activity tracker, optical drive, or smartwatch, and provides high-speed data transfer.

Compare this to the other USB ports and descriptions.

For example, see Page 7

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HP ProBook 430 G7 Notebook PC

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