Chang Hun Na

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Goyang-si, KR

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for mechanically reducing internal pressure of...
- Patent number 8,752,576
- Issue date Jun 17, 2014
- Pields Engineering Inc.
- Chang Hun Na
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
APPARATUS AND METHOD FOR MECHANICALLY REDUCING INTERNAL PRESSURE OF...
- Publication number 20100288371
- Publication date Nov 18, 2010
- PIELDS ENGINEERING INC.
- Chang Hun Na
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...