When did the stethoscope come into existence? And who was the inventor?

Nobody imagines a medical doctor, today,without a stethoscope.

I've just noticed that today happens to be the inventor's birthday. He was a Breton, named René Laennec, born in Quimper on 17 February 1781. Apparently he made his discovery of this device while watching children in Paris, who were playing with a long wooden beam. One child would simply scratch one end of the beam with the point of a nail, while another child would plac his ear against the other end of the beam, enabling him to hear the scratching sounds.

Laennec rolled up stiff paper to form a cylinder which could be held against the patient's chest, enabling the doctor to listen clearly to the patient's breathing and heart beats.