US Patent 7789599 Drill
Patent 7789599 was granted and assigned to OSG Corporation on September, 2010 by the United States Patent and Trademark Office.
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Patent abstract
A drill including a columnar body that is rotated about an axis, a cutting edge that is formed at the tip end of the body, and a thinning edge that is formed continuously with the cutting edge close to the axis of the body, by having a thinning at the tip end of the body. The thinning edge is formed such that a rake angle of the thinning edge relative to the axis of the body changes depending on a location of the thinning edge, where the rake angle of the thinning edge close to the cutting edge is a positive angle larger than that close to the axis of the body.
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Patent Inventor Names
Yoshihiro Takikawa0
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US Patent 07789599 Drill US Patent 7789599 Drill
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Patent Number
077895990
Patent Number
77895990
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Official Website
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Is a
Current Assignee
Patent Jurisdiction
Patent Number
077895990
Date of Patent
September 7, 2010
0Patent Application Number
118115640
Date Filed
June 11, 2007
0Official Website
Patent Primary Examiner
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US Patent 07789599 Drill
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07789599
Date of patent
September 7, 2010
Patent application number
11811564
Date Filed
June 11, 2007
Patent primary examiner
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