HIstory of the Complete Blood Count (CBC) test

As a result of a Complete Blood Count (CBC) test, i've been diagnosed with a blood abnormality.

What i'd like to know is how long the CBC has been in wide usage (how many decades since it became so standard).

The wikipedia suggests that automated counting equipment was developed in the 1950s and 1960s. https://en.wikipedia.org/wiki/Complete_blood_count This date range, however, is too approximate for me.

The reason i'm asking is that i wonder if my dad or mom had the same blood condition that i have when they were the age i am at now. That was about 50 years ago (they were older parents than usual). If the CBC was in widespread use in the 1960s or 1970s then i probably would have heard about their condition. But if the CBC was not in widespread use, then they may have had the condition but just never knew about it. It's way too late to ask them if they ever had the test, but i would like to know how widespread the test was during that time, as well as when the reference values for the different counts became established.

Thanks in advance for any pointers, or where i might find this information.

dan

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