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:
Dec. 27, 1983
Filed:
Mar. 18, 1981
Applicant:
Inventor:
Kazuo Nunokawa, Tokyo, JP;
Assignee:
Tokyo Kogaku Kikai Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ; A61B / ; G03B / ;
U.S. Cl.
CPC ...
351207 ; 354 62 ; 351214 ;
Abstract
An eye fundus camera including an illuminating system having two apertured masks. One of the masks has a pair of coaxial ring-shaped slits and located with respect to the objective lens in conjugate with the cornea of the patient's eye, whereas the other has a ring-shaped slit in conjugate with the iris of the eye. The arrangement is effective to provide an increased field angle with a substantially uniform illumination without having adverse effects of harmful reflections.
Nunokawa, Kazuo. (1983). Eye fundus camera having ring slit mask in illuminating system (U.S. Patent No. 4422736). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4422736
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile