33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 2025
168597
13324
2
Public Timelines
FAQ

may 28, 1931 - ABO Blood Type

Description:

Development of the absorption-inhibition ABO blood typing technique.

Added to timeline:

20 Oct 2017
0
0
682

Date:

may 28, 1931
Now
~ 94 years ago