U.S. federal trademark · Serial No. 73185002 · Reg. No. 1153719
Endodontic Teaching Aid-Namely, Transparent Machineable Plastic Block Material with a Hole Entering One Face, the Hole Simulating a Root Canal of a Human Tooth, Whereby a File as Used in Endodontia May Be Reciprocated in the Hole to Simulate the Filing of a Human Root Canal
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