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The Security Patent of the Day goes to an Independent Inventor from Indiana for a Lockable manhole cover
01/09/07

7,160,050 Lockable manhole cover
  Issued: January 9, 2007
  Filed: April 12, 2005
  U.S. Class: 404/25
Abstract:  A manhole system including a cover, a frame receiving the cover and at least one security device securing the cover to the frame.

Posted by GEN-ERIC at 12:05:05 pm into the following categories: Patents of the Day

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