July 3rd is an important day in Delaware history. Here are five interesting facts about this day:

1. The Battle of Cooch's Bridge: On July 3, 1777, the Battle of Cooch's Bridge was fought between British troops and American soldiers under General William Maxwell. It was the only battle of the Revolutionary War fought on Delaware soil.

2. Ratification of the Constitution: On July 3, 1787, Delaware became the first state to ratify the United States Constitution, which was later signed on September 17, 1787.

3. The First U.S. Patent: On July 3, 1790, Samuel Hopkins received the first-ever U.S. patent for a process of making potash, a potassium-rich substance used in soap and glassmaking.

4. The Birthplace of Henry Heimlich: On July 3, 1920, Henry Heimlich, the inventor of the Heimlich maneuver, was born in Wilmington, Delaware.

5. The Dunes Sagebrush Lizard: On July 3, 2012, the U.S. Fish and Wildlife Service proposed to list the Dunes Sagebrush Lizard as an endangered species. This lizard is found in parts of Delaware, Texas, and New Mexico.