Number | Name | Date | Kind |
---|---|---|---|
1449165 | Cameron | Mar 1923 | |
2449435 | Whittemore | Sep 1948 | |
2502014 | Loggie | Mar 1950 | |
3436157 | Adler et al. | Apr 1969 | |
3773425 | Bentley | Nov 1973 | |
3986777 | Roll | Oct 1976 | |
4291985 | Tsujimura | Sep 1981 | |
4523852 | Bauer | Jun 1985 | |
4527895 | Rubin | Jul 1985 | |
4534644 | Beesley | Aug 1985 | |
4608015 | Smigel | Aug 1986 | |
4654794 | O'Brien | Mar 1987 | |
4836674 | Lequime et al. | Jun 1989 | |
4885667 | Selden | Dec 1989 | |
4978296 | Antons et al. | Dec 1990 | |
5064281 | Davis | Nov 1991 | |
5351424 | Schulle | Oct 1994 | |
5383020 | Vieillefosse | Jan 1995 | |
5398176 | Ahuja | Mar 1995 | |
5428450 | Vieillefosse et al. | Jun 1995 | |
5636984 | Gomes | Jun 1997 |
Entry |
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Article by Bergen et al. entitled "Dental Operatory Lighting and Tooth Color Discrimination", JADA, vol. 94, Jan. 1977, pp. 130-134. |
Article by Sproull entitled "Color Matching in Dentistry: The Three-Dimensional Nature of Color", Journal of Prosthetic Dentistry, vol. 29, No. 4, Apr. 1973, pp. 416-422. |
Advertisement for Esthelite Shade Matching Light, at least as early as May 16, 1997. |