Medical inventions and Discoveries

Stethoscope - Laennec (1819)

Chemotherapy - Ehrlich (1909)

Pace maker - Zoll (1952)

Hearing aid - Sonotone Corporation, USA (1952).

Heart –lung machine - Dr. John H. Gibbon. (1953)

Artificial heart - Willem kolff (1957)

LASER - Gould (1957)

MRI -Damadian (1971)

Cloning DNA - Boyer, Cohen (1973)

CT Scan - Hounsfield (1973)

HIV -M.Cockerell. (1984)

Microscope

Compound - Z.Janssen (1590)

Electron -Ruska knoll (1931)