De Fu Chen

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Zhejang, CN

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Patents Grantslast 30 patents

Information Patent Grant
Non-refillable valve
- Patent number 6,808,159
- Issue date Oct 26, 2004
- Discount Refrigerants, Inc.
- De Fu Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Non-refillable valve
- Patent number 6,595,486
- Issue date Jul 22, 2003
- Discount Refrigerants, Inc.
- De Fu Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Non-refillable valve
- Publication number 20050082501
- Publication date Apr 21, 2005
- Discount Refrigerants, Inc.
- De Fu Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...