Samuel Hopkins, an inventor from Philadelphia, Pennsylvania,…

July 1790 CE

Samuel Hopkins, an inventor from Philadelphia, Pennsylvania, becomes on July 31 the first to be issued a U.S. patent (for an improved method of making potash).

The patent was signed by President George Washington, Attorney General Edmund Randolph, and Secretary of State Thomas Jefferson.

The other U.S. patents issued this year will be for a new candle-making process and Oliver Evans's flour-milling machinery.

Locations
Philadelphia Philadelphia Pennsylvania United States View →

People
George Washington View → Thomas Jefferson View → Edmund Randolph View →

Groups
United States of America (US, USA) (New York NY) View →

Subjects
Products View → Government View → Custom and Law View →

Regions

Subregions

Related Events

Active Filters
People: Matthias Corvinus
Refine Results

No related events match the current filters.