US Patent 9156094 Step drill for wood
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Patent abstract
A wood drill bit has a plurality of step sections where each step section has at least one flute that terminates in a cutting edge. The effective diameter of each of the plurality of step sections is different than the diameter of the other of the plurality of step sections such that a single bit may be used to bore holes in wood of different diameters.
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US Patent 09156094 Step drill for wood US Patent 9156094 Step drill for wood
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Patent Number
0915609400
Patent Number
915609400
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Patent Jurisdiction
Patent Number
091560940
Date of Patent
October 13, 2015
0Patent Application Number
137445010
Date Filed
January 18, 2013
0Official Website
Patent Primary Examiner
Edits on 24 Sep, 2022
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Infobox
Is a
Patent Jurisdiction
Patent Number
091560940
Date of Patent
October 13, 2015
0Patent Application Number
137445010
Date Filed
January 18, 2013
0Official Website
Patent Primary Examiner
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US Patent 09156094 Step drill for wood
Infobox
Is a
Patent jurisdiction
Patent number
09156094
Date of patent
October 13, 2015
Patent application number
13744501
Date Filed
January 18, 2013
Patent primary examiner
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