Skip to main content

This Day in American History

April 29

1 historic event on this date

Historical1913

Zipper Patented, Reflecting American Innovation Culture

Gideon Sundback received a patent for the modern zipper, one of thousands of American inventions protected by the patent system established in the Constitution. Article I, Section 8 empowers Congress to promote the progress of science and useful arts through patents.

Why It Matters

The patent system reflects the founders' recognition that protecting intellectual property encourages innovation, a principle that has driven American economic growth and technological leadership.

Explore the Principles Behind the History

Every event in American history connects to the founding principles. Discover the ideas that shaped these moments.

View the 28 Founding Principles