Question

Inventors of :
1) Anesthesia, local?
2) Ball point pen?
3) Bifocal lens?

Answer 1

Hi friend

Inventors of :

1) Anesthesia, local - Karl Koller in 1859

2) Ball point pen - John J. Loud in 1888

3) Bifocal lens - Benjamin Franklin in 1780.

Hope dis helps you aishu

Answer 2

1) Local Anesthesia =>Karl Köller

2)Ball point pen =>John J. Loud

3)Bifocal lens =>Benjamin Franklin