linguistic:paraphrasing
Growth of film industry

Eastman recognized that most of his revenue would come from the sale of additional film rolls, rather than camera sales, and focused on film production. By providing quality and affordable film to every camera manufacturer, Kodak managed to turn competitors into de facto business partners. In 1889 he patented the processes for the first nitrocellulose film along with chemist Henry Reichenbach. A number of patent infringement lawsuits would preoccupy Eastman and his lawyers in subsequent years, including one from Reichenbach after he was fired in 1892. The largest lawsuit would come from rival film producer Ansco. Inventor Hannibal Goodwin had filed a patent for nitrocellulose film in 1887, prior to Eastman and Reichenbach's, but it was not granted until 1898. Ansco purchased the patent in 1900 and sued Kodak for infringement. Kodak ultimately lost the suit, which lasted over a decade and cost the company $5 Million.

Eastman paid close attention to Kodak's advertisements. He coined the slogan, “ You press the button, we do the rest ”, which became ubiquitous in the general public.

As Kodak pursued a monopoly on film through patents and acquisitions, the company experienced rapid growth. By 1896, Kodak was the leading supplier of film stock internationally, and by 1915, the company was the largest employer in Rochester, with over 8,000 employees and annual earnings of $15.7 Million. In 1934, shortly after Eastman's death, Kodak employed 23,000. One of the largest markets for film became the emerging motion picture industry. When Thomas Edison and other film producers formed the Motion Picture Patents Company in 1908, Eastman negotiated for Kodak to be sole supplier of film to the industry. His monopolistic actions attracted the attention of the federal government, which began an anti-trust investigation into Kodak in 1911 for exclusive contracts, acquisitions of competitors, and price-fixing. This resulted in a lawsuit against Kodak in 1913 and a final judgement in 1921, ordering Kodak to stop fixing prices and sell many of its interests.

Kodak's growth was sustained during the 20th century by new innovations in film and cameras, including the Brownie camera, which was marketed to children. Eastman took interest in color photography in 1904, and funded experiments in color film production for the next decade. The resulting product, created by John Capstaff, was a two-color process named Kodachrome. Later, in 1935, Kodak would release the more famous second Kodachrome, the first marketed integral tripack film. During World War I, Eastman established a photographic school in Rochester to train pilots for aerial reconnaissance.

In an era of growing trade union activities, Eastman sought to counter the union movement by anticipating worker demands. To this end, he implemented a number of worker benefit programs, including a welfare fund to provide workmen's compensation in 1910 and a profit-sharing program for all employees in 1912.