After Dickson developed the basic technology, Edison worked with him to perfect the sound reproduction and image quality. He filed a patent for the Kinetograph, used to take pictures, and the Kinetoscope, used for viewing pictures, in 1891. Although he was busy with the ore-milling project and did not get a chance to effectively market and package the new inventions for a few years, the Kinetoscope was the first commercially used viewing technology. They were placed in viewing parlors, called Nickelodeons, which charged customers twenty- five cents admission to peer into each machine. The first parlor was opened in Manhattan in April 1894.Although the Kinetoscopes were instantly successful, trouble heated up when competitors began pushing for the development of a screen projection camera and Edison's relationship with Dickson deteriorated. Dickson left West Orange during the
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