US Patent 7782354 Optical writing device and image forming apparatus
Patent 7782354 was granted and assigned to RICOH COMPANY,LTD. on August, 2010 by the United States Patent and Trademark Office.
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Patent abstract
An electrophotographic optical writing device equipped with a semiconductor laser includes the semiconductor laser, a collimating lens, an aperture, a cylindrical lens, and a polygon scanner. An additional aperture, a second aperture, is provided in a light path between the semiconductor laser and the collimating lens.
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Patent Inventor Names
Kozo Yamazaki0
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US Patent 07782354 Optical writing device and image forming apparatus US Patent 7782354 Optical writing device and image forming apparatus
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Patent Number
07782354
Patent Number
7782354
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Official Website
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US Patent 07782354 Optical writing device and image forming apparatus
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Is a
Current assignee
Patent jurisdiction
Patent number
07782354
Date of patent
August 24, 2010
Patent application number
12073312
Date Filed
March 4, 2008
Patent primary examiner
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