How do I trace the origins of a company no longer in business?

Question

I was given shares of a company from my grandmother's estate that her parents invested in. The shares are dated 1920 and the value was $1500 in 1920's dollars. The company no longers exists, having either gone bankrupt or was acquired, so how do I figure out if the shares are worth anything or not?

Answer 1

Better Business Bereau?

Answer 2

they are worthless if the company no longer exists

Answer 3

go to http://www.dnb.com

Answer 4

GO TO THE COURTHOUSE AND TRACE THE RECORDS LOL