Sehr sehr wichtig....bitte Text auf Fehler überprüfen

Hallöchen... ich gestalte gerade ein Plakat über Edison.... doch nun weiss ich leider nicht ob mein Text frei von grammatikalsichen Fehlern ist... besonders schwer fällt mir die Zeitform (weiss nie welche Zeitform ich nehmen muss) ;)

Bitte helft mir....ich nehme jeden Vorschlag dankend entgegen ;)
ps. aus dem Text sollen stichpunkte später werden

Thomas Alva Edsion was an American inventor, scientist and businessman. He developed many devices that greatly influenced life around the world for example the phonograph, the motion picture camera and the elctric light bulb. During his lifetime, Ediosn was granted 1093 patents in the United States.
His life: Thomas Alva Edison was born on February 11, 1847 in Milan (Ohio). He was the seventh and last child of Samuel Edison and Nancy Elliot. His mother took him out of the school and began teaching him at home. Whenever he got money, he bought chemicals from a local pharmacist. At the age of 12, Thomas get a job on the daily train for a boy to sell magazines, newspapers and snacks to passengers. 1862 Edison gets his first telegraphy job in Port Huron. Six years later, he files his first patent (vote recorder). 1870 Edison opens his first workshop in Newark (New Jersey). 1871 Edison marries Mary Stilwell on December 25. They had 3 children: Marion Estelle, Thomas Alva Jr. and William Leslie. Five years later. Thomas Edison opens the Menlo Park lab. 1877 Ediosn invents the telephone transmitter and the first cylinder phonograph. Edison achieves success with the incandescent light bulb (1879). His first wife, Mary Stilwell, dies on August 1884. On February 1886, Edison marries the 20-year-old Mina Miller. They also had 3 children: Madeleine, Charles and Theodore. 1888 Edison and Dickson begin their work on the kinetoscope and kinetograph. 1909 he develops a practical storage battery. Thomas Alva Edison dies in West Orange in 1931.