What is the name of the treaty that allows American patents to be recognized and enforced in member countries

The Paris Convention for the protection of Industrial Property.

Explanation:

Paris Convention for the Protection of Industrial Property was signed in Paris, France, on 20 March 1883. It applied to industrial properties such as trademarks, industrial designs, patents, geographical indications, etc.

This international agreement was seen by name as the first notable step taken to enable creators ensure that all their intellectual works were duly protected in other nations.  

continental currency was denominated in dollars from $​1⁄6 to $80, including many odd denominations in between.