US Patent 7213779 Rotary grinder apparatus and method
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Patent Inventor Names
Duane R. De Boef0
Gary Verhoef0
Keith Roozeboom0
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Patent abstract
A rotary grinder having a cylindrical drum that includes a cylindrical surface. The cylindrical surface defines two holes. The drum receives opposite ends of a through-member at the two holes such that the opposite ends of the through-member comprise hammers when the cylindrical drum is rotated. A single retaining member is used to secure all of the through-members to the drum.
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US Patent 07213779 Rotary grinder apparatus and method US Patent 7213779 Rotary grinder apparatus and method
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Patent Number
07213779
Patent Number
7213779
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US Patent 07213779 Rotary grinder apparatus and method
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Is a
Patent jurisdiction
Patent number
07213779
Date of patent
May 8, 2007
Patent application number
10953208
Date Filed
September 28, 2004
Patent primary examiner
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