Dentistry – Apparatus – Broach
Reexamination Certificate
2005-03-29
2005-03-29
Lewis, Ralph A. (Department: 3732)
Dentistry
Apparatus
Broach
C433S027000, C433S072000
Reexamination Certificate
active
06872075
ABSTRACT:
This invention modifies hand root canal files used in dentistry by placing metallic contact areas on the plastic handle. This change makes using electronic apex locators to determine the length of the root canal much faster and easier.
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patent: 6520773 (2003-02-01), Weber
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