Did research in psychology lead to any useful technology?
Artificial intelligence has received a strong influence from cognitive science, not only in its name.

Concepts like the P300 might have an application in lie detection. See this.

Cognitive psychology is in the basis of assessments for drivers, pilots. For that you'll need to work through concepts like attention, concentration, and the like. 

That said, it's not in the scope of psychology to produce technology. So, you won't find much more than concepts/views/ideas flowing into/inspiring a technology.