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:
May. 31, 2005
Filed:
Sep. 18, 2002
Applicants:
Kazuhiro Kobayashi, Yamanashi-ken, JP;
Yuichiro Tanda, Yamanashi-ken, JP;
Yasuaki Kayanuma, Yamanashi-ken, JP;
Inventors:
Kazuhiro Kobayashi, Yamanashi-ken, JP;
Yuichiro Tanda, Yamanashi-ken, JP;
Yasuaki Kayanuma, Yamanashi-ken, JP;
Assignee:
Citizen Electronics Co., Ltd., Yamanashi-ken, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B006/36 ;
U.S. Cl.
CPC ...
Abstract
A bidirectional optical transmission device has a housing having a guide portion in which an end of a single optical fiber is to be inserted. A light-receiving device and a light-emitting device are provided in the housing. Light path restricting members are provided in the light-receiving device so as to restrict light beams entering the light-receiving device.