Which U.S. President filed a patent for a device to lift boats over shoals and obstacles in rivers?

Throughout American history, presidents have sometimes been involved with product development and innovations before, during, or after their time in office. This connection between commercial products and political figures represents an interesting intersection of government and business. Test your knowledge about these presidential product connections that helped shape both commerce and political branding.

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Abraham Lincoln
Thomas Jefferson
Theodore Roosevelt
Herbert Hoover