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NIHF Inductee Hannibal Goodwin Invented Flexible Photographic Film
MyDay - Important events - Hannibal Goodwin patents celluloid photographic film
Hannibal Goodwin, American clergyman
On This Day - Pauline Park
Hannibal Goodwin, American clergyman
Film pioneer Hannibal Goodwin was Ulysses native
May 2, 1887: Celluloid-Film Patent Ignites Long Legal Battle
C is for Celluloid: The Goodwin vs. Kodak patent battle over flexible film - National Science and Media Museum blog
Hannibal Williston Goodwin Clergyman, inventor of celluloid Photofilm Patent George Eastman Kodak - ™