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| Number | Title | Issue Date |
| 4165546 | Portable cuspidor A portable cuspidor supplied with rinse water and vacuum drainage through ganged flexible hoses has a hollow, enclosed cuspidor cup or bowl provided with a cushioned side wall opening against which facial areas surrounding the mouth of the patient or user... | 08/28/1979 |
| 3964112 | Dental cuspidor with fluid recirculation system A water recirculation system is described wherein the discharge of one or more dental cuspidors is rendered reuseable and continuously used in the operation of a water sealed vacuum pump in a dental vacuum discharge system.... | 06/22/1976 |
