Antonin Jean Desormeaux
Antonin Jean Desormeaux ( 25 December 1815 – October 1894 ) was a 19th-century French physician and inventor who has been called the "father of endoscopy" , because he made significant improvements to the early endoscope and was the first to successfully use it to operate on a living patient ( his device would be called a cystoscope today ) . 
<triplet> Antonin Jean Desormeaux <subj> 25 December 1815 <obj> date of birth <subj> October 1894 <obj> date of death