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Hannes W. Keller
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physicist
Hannes W. Keller
Swiss physicist (1939–2023)
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Michael Keller
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president
Switzerland
Occupation
physicist, entrepreneur
Position held
president
Citizenship
Switzerland
Born
January 31, 1939
Died
February 15, 2023
Family
Michael Keller
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president
position held
Switzerland
country of citizenship