Amos Emerson Dolbear (November 10, 1837 – February 23, 1910) was an American inventor. His patents interfered with Guglielmo Marconi's planned activities in the US. November 10 is the 314th day of the year (315th in leap years) in the Gregorian Calendar, with 51 days remaining. ... 1837 was a common year starting on Sunday (see link for calendar). ... February 23 is the 54th day of the year in the Gregorian Calendar. ... -1... An inventor is a person who creates new inventions, typically technical devices such as mechanical, electrical or software devices or methods. ... Guglielmo Marconi Guglielmo Marconi, GCVO (25 April 1874 – 20 July 1937) was an Italian electrical engineer and Nobel laureate, known for the development of a practical wireless telegraphy system commonly known as the radio. Marconi was President of the Accademia dItalia and a member of the Fascist Grand Council...

He invented the first telephone receiver with a permanent magnet in 1865, 11 years before Alexander Graham Bell patented his model. Later, Dolber couldn't prove his claim, so Bell kept the patent. 1865 is a common year starting on Sunday. ... Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-American-Canadian scientist and inventor. ...

In 1882 Professor Amos E. Dolbear was able to communicate over a distance of a quarter of a mile without wires. It is interesting to note that the Tufts Professor was ahead of Hertz and Marconi. (marconi first let'er rip in 1895) He received a U.S. patent for a wireless telegraph in March of that year. His device relied on induction, not RF. His set-up used phones grounded by metal rods poked into the earth. His transmission range was a little less than a mile, but he received a patent for it (U.S. Patent No. 350,299).

But more importantly the Dolbear patent prevented the Marconi Company from operating in the United States. In the end Marconi had to purchase Dolbears patent, even though it was A. generally inferior and B. untractable in application. [Ouch that must have hurt. ]

In 1868 Dolbear (while a professor at Bethany College) invented the electrostatic telephone. Dolbear also work on converting sound waves into electrical impulses. He also invented the opeidoscope, and a system of incandescent lighting. He authored several books, articles, and pamphlets, including "Matter, Ether, Motion," and was recognized for his contributions to science at both the Paris Exposition in 1881 and the Crystal Palace Exposition in 1882.

Dolbear was a graduate of Ohio Wesleyan University, in Delaware, Ohio. Ohio Wesleyan University (also Wesleyan or OWU, pronounced oh-WOO) is a private coeducational liberal arts college located in Delaware, Ohio. ... Late 19th-Century facades on Sandusky Street The City of Delaware is the county seat of Delaware County, Ohio6. ...

External links

• Amos Dolbear, Tufts faculty as of 1874
• Just Who Did Invent Radio?
• Roxbury's Professor Dolbear