Friedhelm Hillebrand
Friedhelm Hillebrand is a German engineer who has been influential in setting
mobile telecommunications standards. Hillebrand is one of the inventors of the
SMS, as he and Frenchman
Bernard Ghillebaert created the concept for the service in 1984. As chairman of the non-voice services committee for the
Global System for Mobile Communications standard in 1985, he conducted experiments to determine the length needed for
text messages and found that 160 characters was sufficient. This subsequently became the basis for the 140 character limit now used by
Twitter. Hillebrand was inducted into the Wireless Hall of Fame in 2017 for his accomplishments in the wireless industry.
Hillebrand was born in
Warstein in 1940, and as a child, was active in
amateur radio. He gained a master's degree in telecommunications in 1968, then started his career with the
German post office, which was then also responsible for telephones. After retiring from that career, he started a consultancy advising on technology patents.
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