Membership
Tour
Register
Log in
Richard DeGreef
Follow
Person
Shelby Township, MI, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Sewer grate locking mechanism and method of installing same
Patent number
7,201,533
Issue date
Apr 10, 2007
Grate Sewer Lock Co., LLC
Richard DeGreef
E03 - WATER SUPPLY SEWERAGE
Patents Applications
last 30 patents
Information
Patent Application
Method and apparatus for locking a manhole cover
Publication number
20070081856
Publication date
Apr 12, 2007
Richard DeGreef
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Application
Sewer grate locking mechanism and method of installing same
Publication number
20050196238
Publication date
Sep 8, 2005
Richard DeGreef
E03 - WATER SUPPLY SEWERAGE