Number | Name | Date | Kind |
---|---|---|---|
D197048 | Troy | Dec 1963 | |
D199560 | Thompson | Nov 1964 | |
D199893 | Bond et al. | Dec 1964 | |
D202873 | Husted | Nov 1965 | |
2158738 | Baker et al. | May 1939 | |
2206726 | Lasater | Jul 1940 | |
2875458 | Tsuda | Mar 1959 | |
3104405 | Perrinjaquet | Sep 1963 | |
3466689 | Aurelio et al. | Sep 1969 | |
3840932 | Balamuth et al. | Oct 1974 | |
4991249 | Suroff | Feb 1991 |
Number | Date | Country |
---|---|---|
WO9210146 | Jun 1992 | WOX |
Entry |
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Teledyne Water Pik "Plaque Control 3000" plaque removal instrument (Jul. 1991). |
American Dentronics Incorporated "Soniplak" sonic plaque removal system (May 1993). |