What black inventor invented the horse shoe?
Oscar E. Brown
Who is Oscar E Brown?
Oscar Brown was an African American inventor and a part of Western New York’s history. In 1892, Brown was issued the United States Patent No. 481, 271 for the improved “horseshoe.” The goal of this improved horseshoe was to provide a secure and reliable lock for fastening the lower shoe to the upper shoe.
Where was the automatic elevator doors invented?
Alexander Miles of Duluth, Minnesota patented an electric elevator on October 11, 1887. His innovation in the mechanism to open and close elevator doors greatly improved elevator safety. Miles is notable for being a Black inventor and successful businessperson in 19th-century America.
When was the automatic elevator invented?
1900
How did Alexander Miles create the elevator door?
Miles was determined to solve this problem. He attached a flexible belt to the elevator cage, which touched drums positioned along the elevator shaft, directly above and below the floors. His invention allowed elevator shaft doors to operate at the correct times.
Why did Henry Blair invent the corn planter?
Blair’s corn planter resulted in more efficient crop planting and resulted in greater overall yield for farmers. According to an 1836 article from The Mechanics’ Magazine, Blair’s invention was conjectured to “save the labor of eight men.” On August 31, 1836, Blair obtained a patent for his mechanical cotton planter.
Who is the owner of a patent?
A patent application and any resulting patent is owned by the inventor(s) of the claimed invention, unless a written assignment is made or the inventors are under an obligation to assign the invention, such as an employment contract.
How long does a patent last?
20 years
What are the 3 types of patents?
The three types of patents are utility patents, design patents, and plant patents. A utility patents protect the function of a composition, machine, or process.