The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
Apr. 07, 2021
Kai R&d Center Co., Ltd., Gifu, JP;
Naoki Ozawa, Gifu, JP;
Kazuyuki Hasebe, Gifu, JP;
Kazuhiko Isogimi, Gifu, JP;
Shinya Sonoda, Kagoshima, JP;
KAI R&D CENTER CO., LTD., Gifu, JP;
Abstract
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 sac incision portion and a second side blade defines a second lacrimal sac incision portion. A blade portion has a length size of approximately from 4.0 mm to 7.0 mm in a longitudinal direction, and a maximum width size of approximately from 1.4 mm to 2.0 mm in a width direction. The stabbing blade has a blade length size of approximately 1.2 mm in the longitudinal direction, and a maximum width size of approximately from 1.2 mm to 1.5 mm in the width direction. The first side blade and the second side blade respectively have a blade length size of approximately 3.0 mm to 5.0 mm in the longitudinal direction.