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:
Aug. 30, 1988
Filed:
Jan. 18, 1985
Applicant:
Inventors:
Kazuyoshi Hata, Sakai, JP;
Sachiko Takamura, Sakai, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350432 ; 350480 ;
Abstract
The present invention provides an objective lens system for optical recording type disks, comprising from a light source side to a disk side; a first lens element having a positive refractive power, said first lens element having at least an aspherical surface; a second lens element having a positive refractive power; and wherein the objective lens system fulfills the following condition:
Hata, Kazuyoshi. (1988). Objective lens system for optical recording type disks (U.S. Patent No. 4767202). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4767202
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile