Tech Geek Synchron, which is developing a brain-computer interface that helps paralysis patients text, email, and shop online, raises $40M Series B led by Khosla VenturesBy Daniel HarrisonMarch 7, 20230 synchron series khosla venturesparkfiercebiotech Synchron, which is developing a brain-computer interface that helps paralysis patients text, email, and shop online,…