US3128988A - Turbine driven air bearing dental handpiece ...
US3128988A US3128988DA US3128988A US 3128988 A US3128988 A US 3128988A US 3128988D A US3128988D A US 3128988DA US 3128988 A US3128988 A US 3128988A Authority US United States Prior art keywords rotor housing turbine air bearing Prior art date 1964-04-14 Legal status (The legal status is an assumption and is not a legal conclusion.
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