Richard DeGreef

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Shelby Township, MI, US

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Patents Grantslast 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 Applicationslast 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