1893 - Thomas Edison received two U.S. patents. The first was for a "Cut Out for Incandescent Electric Lamps" and another for a "Stop Device" (No. 491,992-3). Also No. 492,150 for "Process of Coating Conductors for Incandescent Lamps."
... opening.
In the human male, the urethra is about 8 inches (200 mm) long and opens at the end of the penis.
Medical problems of the urethra:
Hypospadias[?] is ...