Because, what people fail to realise is that patents aren't 100% accurate.If this is old, why did nintendo decide to move the slidepads around?
They're rough designs to show what you're trying to patent.
Like this, and that schematic of how the wii u will work.
People think it's showing the hardware, they couldn't be further from the truth.
They're just diagrams to show the process of thought you went through while making what you're trying to patent.