52. Neurocam Wearable Camera
What is it? It records a person’s mindwaves
Invented: 2014
Average price: $17.73*
Neurowear is a Japanese technology company that invented the “Neurocam” which records your brainwaves. The Neurocam mounts a smartphone on the side of the head. When it senses the brainwave activity, the Neurocam records what the user is seeing.

It sounds like a device that Lockheed Martin might come up with. But it’s for civilian use. Imagine being in a street and seeing something funny or interesting. Neurocam records automatically, so you don’t have to fiddle with your phone.