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:
Oct. 03, 2000
Filed:
Jul. 06, 1998
Naoto Sugawara, Tokyo, JP;
Hiroki Ishida, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetic recording apparatus including a magnetic head portion 9, a light emitting portion 10b emitting a light beam, a hologram portion 10a, a light receiving portion 10c, a carriage 12 and a control portion 16 for positioning the magnetic head portion 9 to a predetermined position. The hologram portion 10a is in a plate-like shape and has on one major surface a first gold reflection surface 10a3 formed on a first thing film layer 10a1 and on the other major surface a second gold reflection surface 10a4 formed on a second thin film layer 10a2. The hologram portion 10a also includes a light path 10a5 that guides the light beam in a zig-zag manner between the first and the second reflection surfaces 10a3 and 10a4 and optical components 10a8, 10a9, 10a10 for converting the light emitted from the light emitting portion 10b into a positioning light beam.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile