Jacobus "Jaap" Cornelis Haartsen (born 13 February of 1963, The Hague, Netherlands) is a Dutch electrical engineer, researcher, inventor and entrepreneur, best known for being credited as the inventor of Bluetooth.
He obtained his Master of Science degree in 1986 in electrical engineering (with honors) at the Delft University of Technology in the Netherlands.
After a brief period at Siemens in The Hague and Philips in Eindhoven, he continued his studies and in 1990 obtained a PhD degree from the Delft University of Technology (also with honors) defending the thesis titled Programmable surface acoustic wave detection in silicon: design of programmable filters.
While working for Ericsson Mobile Terminal Division in Lund, he developed the specification for Bluetooth.
Between 2000 and 2008 he was a part-time professor at University of Twente, teaching mobile radio communications systems.