ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,459, issued on April 14, was assigned to DOULOSTEC.CO.,LTD (Seoul, South Korea).

"Device comprising handpiece connector having filter coupled thereto" was invented by Man Yong Kim (Seoul, South Korea) and Moung Keun Kim (Gunpo-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device including a handpiece connector to which a filter is coupled can be combined with the handpiece and has a connector accommodating therein a filter with an increased cross-sectional area, which can be replaced in a detachable manner, so that it can prevent saliva, blood, bacteria, and foreign substances that may be mixed with the air flowing along inside t...