HM US Innov. Dollar Introductory 2018 D

• Introductory issue of the American Innovation $1 Coins Series.

• This series focuses on American inventors and inventions. Four issues will be published each year.

• The introductory issue bears George Washington's signature, signing the first US patent in 1790.

• The coin is minted by the Denver Mint, mintmark D (in edge lettering).