US Patent 7160050 Lockable manhole cover
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Patent Inventor Names
William G. Meyers0
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Patent abstract
A manhole system including a cover, a frame receiving the cover and at least one security device securing the cover to the frame.
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US Patent 07160050 Lockable manhole cover US Patent 7160050 Lockable manhole cover
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Patent Number
07160050
Patent Number
7160050
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US Patent 07160050 Lockable manhole cover
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Is a
Patent jurisdiction
Patent number
07160050
Date of patent
January 9, 2007
Patent application number
11103876
Date Filed
April 12, 2005
Patent primary examiner
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