7 Methods for guiding merchant ships out of mined harbors. Thomas Edison’s Inventions have made profound impacts on society. The idea of electric lighting was not new. 1887-1890 Made major improvements on the brown wax and black wax cylinder phonograph. He accomplished this when he was able to come up with an incandescent lamp with a filament of carbonized sewing thread that burned for thirteen and a half hours. He held over 1,000 patents for his inventions. Invented a wireless system of communication between ships at sea, ships and shore and ships and distant points on land. 1869 Went into partnership with Franklin L. Pope as an electrical engineer. The system was installed on the Lehigh Valleys R. R. in 1887, and was used there for several years. The unique type of kiln he developed for making these houses proved to be of great importance in the cement industry. Thomas Edison’s first great invention was the tin foil phonograph. Also organized and established shops at 104 Goerck St., 108 Wooster St., and 65 Washington St. in New York City, for the manufacture of dynamos, underground conductors, sockets, switches, fixtures, meters, etc. Inventors, entrepreneurs. 1879 Constructed the first electric motor ever made for a 110 to 120 volt line at Menlo Park, N. J. 1915 Because military conflicts in Europe had created an enormous demand for phenols, and supplies were uncertain, he invented the first synthetic form of carbolic acid (C6H6O). Also invented paraffin paper (which was first used for wrapping candies), the electric pen, the forerunner of the present day mimeograph machine, the carbon rheostat, the microtasimeter, etc. This device is still in existence and operative, and is located in the Edison Historical Collection in New Jersey. Continued to invent improvements to his phonograph - his favorite invention - and associated cylinders. And before Edison could make his millions, every one of these elements had to be tested through careful trial and error and developed further into practical, reproducible components. 1881 Opened business offices at No. Perhaps of even more significance, the principle is still of fundamental  importance in today's silicon chip and computer industry. By October, had completed construction of that station. 465,971 was issued on this invention, the application having been filed May 23, 1885 - two years prior to the publication of the work of Hertz. 1917-1918 Worked on special experiments relating to defense for the United States Government. Twelve years later these previously unknown phenomena were recognized as electric waves in free space and became the foundation of wireless telegraphy. Opened a manufacturing shop in Newark, where he made stock tickers and worked on developing the. Worked on improved methods and processes producing his chemical products. 65 Fifth Avenue, New York City. 1882-1883 Designed and contracted for the first three-wire central station for distributing electric light, power, and heat - in standardized form - in Brockton, Massachusetts. Thomas Edison has made lot lot of Inventions and made lot of Discoveries too. Invented and improved upon numerous systems of generation, distribution, regulation and, measurement of electric current and voltage. Edison’s team finished development on the Kinetoscope in 1891. He passed away at age 84 on October 18th, 1931 - on the anniversary date of his invention of the incandescent bulb. Also made many several improvements on the X-ray tube. 1872-1876 Worked on and patented several of his most important inventions, including the motograph and automatic telegraph systems such as the quadruplex, sextuplex and multiplex telegraph which saved Western Union many millions of dollars in wiring. While seeking work, chanced being in the operating room of the Gold & Stock Telegraph Company when their ticker apparatus broke down. The first public demonstration of the Thomas Edison's incandescent lighting system was at the Menlo Park laboratory complex in December of 1879.