Was an American manufacturing conglomerate. It began as a fertilizer company and added many additional lines of business before merging with American Home Products in 1994. The combined company sold off most of its divisions, adopted the name of its remaining Wyeth division, and was bought by Pfizer in 2009, becoming defunct as a separate concern.

https://www.glabarre.com/item/American_Cyanamid_Co_Specimen_Stock_Certificate/22549

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