Number | Name | Date | Kind |
---|---|---|---|
2596183 | Sowa | May 1952 | |
2656841 | Gurley, Jr. | Oct 1953 | |
3194245 | Clarke | Jul 1965 | |
3223090 | Strubel et al. | Dec 1965 | |
3431915 | Licis | Mar 1969 | |
4040431 | Ashworth et al. | Aug 1977 | |
4161953 | Glock | Jul 1979 |
Entry |
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Tobacco and Tobacco Smoke by Wynder et al., Academic Press, New York and London, 1967, pp. 57 and 58. |