Hans Christian Gram

Hans Christian Gram
Hans Christian Gram by Hansen & Weller
Born	Hans Christian Joachim Gram (1853-09-13)13 September 1853 Copenhagen, Denmark
Died	14 November 1938(1938-11-14) (aged 85) Copenhagen, Denmark
Known for	Inventing the Gram stain
Scientific career
Fields	Bacteriology
Doctoral advisor	Japetus Steenstrup

Hans Christian Joachim Gram (13 September 1853 – 14 November 1938) was a Danish bacteriologist noted for his development of the Gram stain, still a standard technique to classify bacteria and make them more visible under a microscope.