ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,395, issued on Nov. 4, was assigned to KAI R&D CENTER Co. LTD. (Gifu, Japan).
"Lacrimal sac incision knife" was invented by Naoki Ozawa (Gifu, Japan), Kazuyuki Hasebe (Gifu, Japan), Kazuhiko Isogimi (Gifu, Japan) and Shinya Sonoda (Kagoshima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rational construction technique of the lacrimal sac incision knife is disclosed. A Lacrimal sac incision knife is insertable into a nasal cavity of a patient, the lacrimal sac incision knife incising the lacrimal sac located in the back of the nasal cavity. A stabbing blade defines a lacrimal sac stabbing portion. A first side blade defines a first lacrimal ...