Intro  German engineer and mathematician  
A.K.A.  Hans Reissner, Hans Jacob Reißner  
Countries  Germany  
Occupations  Physicist Mathematician Engineer University teacher Aerospace engineer  
Gender  male  
Birth  18 January 1874 (Berlin)  
Death  2 October 1967 (Oregon)  
Family 


Education  Technical University of Berlin 
Hans Jacob Reissner, also known as Jacob Johannes Reissner (18 January 1874, Berlin – 2 October 1967, Colton, Oregon), was a German aeronautical engineer whose avocation was mathematical physics. During World War I he was awarded the Iron Cross second class (for civilians) for his pioneering work on aircraft design.
Reissner was born into a wealthy Berlin family that benefited from an inheritance from his greatuncle on his mother's side. As a young engineering graduate, he spent a year in the U.S. working as a draftsman. After this year, he broadened his academic interests to include physics. As a young academic, he published mathematical papers on engineering problems.
During the Nazi regime Reissner was able to work in the aircraft industry although he did not have an Aryan certificate. In 1935 he lost his post at the Technical University of Berlin due to his Jewish ancestry, and in 1938 he emigrated to the United States. He taught at the Illinois Institute of Technology (1938–44) and the Polytechnic Institute of Brooklyn (1944–54).
Curiously, it was this engineer, rather than a physicist or mathematician, who first solved Einstein's equation for the metric of a charged point mass. His closedform solution, rediscovered by several other physicists within the next few years, is now called the Reissner–Nordström metric.
Eric Reissner (Max Erich Reissner, 1913–1996), his son, developed Mindlin–Reissner plate theory.