Author:Carl W. Keuffel
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 | This Author page uses initials in the subject's name, rather than fully spelling out each name. Additional research is required to move this Author page to its full proper title, at which point we can remove this notice. |
Works
[edit]- A Simple Spectrometer, Journal of the Optical Society of America, Volume 12 (1926)
- A Trichromatic Additive Colorimeter, Journal of the Optical Society of America, Volume 12 (1926)
- United States patent 1682572 (28 August 1928)
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1929.
This author died in 1974, so works by this author are in the public domain in countries and areas where the copyright term is the author's life plus 49 years or less. These works may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
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