Roll film of Peter's camera. David Henderson Houston (born June 14, 1841; died May 6, 1906), originally from Cambria, Wisconsin, patented the first holders for flexible roll film. Houston moved to Hunter in Dakota Territory in 1880. He was issued an 1881 patent for a roll film holder which he licensed to George Eastman (it was used in Eastman's Kodak 1888 box camera). Houston sold the patent (and an 1886 revision) outright to Eastman for $5000 in 1889. Houston continued developing the camera, creating 21 patents for cameras or camera parts between 1881 and 1902. In 1912 his estate transferred the remainder
Kodak $1.29 billion to just $5 million for the same period. Kodak's market share declined from 80.1% to 74.7% in the United States, a one-year drop of five percentage points that had observers suggesting that Kodak was slow to react to changes and underestimated its rivals. Although from the 1970s both Fuji and Kodak recognized the upcoming threat of digital photography, and although both sought diversification as a mitigation strategy, Fuji was more successful at diversification. Although Kodak developed a digital camera in 1975, the first of its kind, the product was dropped for fear it would threaten Kodak's photographic film