Introduction: John M Buchanan, based in Rochester, NY, is a renowned inventor with an impressive portfolio of 22 patents. His work primarily focuses on advancements in photographic technologies, significantly influencing the way images are processed and displayed.

Latest Patents: Among his latest patents, one notable invention is titled "Rapid image presentation method employing silver bromide tabular grain." This method allows for the rapid processing of silver bromide color negative films by utilizing shortened color development times alongside specific quantities of color developing agents and bromide ions. Following development and possible desilvering or fixing, the processed film is scanned to generate digital signals that accurately represent density for the color records. These signals undergo digital manipulation to correct interimage interactions and gamma mismatches, ultimately producing a digital record that ensures the desired color and tone scale reproduction. This innovation facilitates the storage and creation of corrected display images, such as color prints.

Another significant patent is the "Method for providing a color display image using duplitized color silver." This method enables the rapid production of a color-corrected display image through the color development of an imagewise exposed, duplitized color photographic element. After development, the image is scanned to create digital signals that also undergo digital manipulation to correct interimage interactions and gamma mismatches among multiple color recording units. The resulting color-corrected image can be presented in various forms, showcasing Buchanan's commitment to enhancing image quality.

Career Highlights: John M Buchanan's career has been marked by his contributions to photographic technology, particularly during his time at the Eastman Kodak Company. His innovative work has not only garnered numerous patents but has also paved the way for advancements in how photographic and color imaging technologies operate.

Collaborations: Throughout his career, Buchanan has collaborated with notable colleagues, including Richard P Szajewski and Stuart T Gordon. Their combined expertise and insights have played a crucial role in the success of various projects and innovations in the field of photography.

Conclusion: John M Buchanan stands out as a significant figure in the realm of photographic inventions. His 22 patents, particularly in rapid image processing and display technology, reflect his dedication to improving the way images are captured, processed, and displayed. As technological advancements continue, Buchanan's innovative contributions remain relevant, influencing future developments in visual media.

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