Heikki I. Helava

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Piedmont, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Tantalum based crucible
- Patent number 7,056,383
- Issue date Jun 6, 2006
- The Fox Group, Inc.
- Heikki I. Helava
- C30 - CRYSTAL GROWTH
Information Patent Grant
Method for fabricating a P-N heterojunction device utilizing HVPE g...
- Patent number 6,890,809
- Issue date May 10, 2005
- Technologies and Deviles International, Inc.
- Sergey Karpov
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Apparatus for growing low defect density silicon carbide
- Patent number 6,863,728
- Issue date Mar 8, 2005
- The Fox Group, Inc.
- Yury Alexandrovich Vodakov
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Low defect density silicon carbide
- Patent number 6,534,026
- Issue date Mar 18, 2003
- The Fox Group, Inc.
- Yury Alexandrovich Vodakov
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Apparatus for growing low defect density silicon carbide
- Patent number 6,508,880
- Issue date Jan 21, 2003
- The Fox Group, Inc.
- Yury Alexandrovich Vodakov
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for growing low defect density silicon carbide
- Patent number 6,428,621
- Issue date Aug 6, 2002
- The Fox Group, Inc.
- Yury Alexandrovich Vodakov
- C30 - CRYSTAL GROWTH

Patents Applicationslast 30 patents

Information Patent Application
Tantalum based crucible
- Publication number 20060174826
- Publication date Aug 10, 2006
- The Fox Group, Inc.
- Heikki I. Helava
- C30 - CRYSTAL GROWTH
Information Patent Application
Tantalum based crucible
- Publication number 20050178315
- Publication date Aug 18, 2005
- The Fox Group, Inc.
- Heikki I. Helava
- C30 - CRYSTAL GROWTH
Information Patent Application
Apparatus for growing low defect density silicon carbide
- Publication number 20030094132
- Publication date May 22, 2003
- Yury Alexandrovich Vodakov
- C30 - CRYSTAL GROWTH
Information Patent Application
Method for fabricating a P-N heterojunction device utilizing HVPE g...
- Publication number 20030049898
- Publication date Mar 13, 2003
- Sergey Karpov
- C30 - CRYSTAL GROWTH
Information Patent Application
Low defect density silicon carbide
- Publication number 20020049129
- Publication date Apr 25, 2002
- White, Fox, Inc.
- Yury Alexandrovich Vodakov
- C01 - INORGANIC CHEMISTRY
Information Patent Application
Apparatus for growing low defect density silicon carbide
- Publication number 20020038627
- Publication date Apr 4, 2002
- Yury Alexandrovich Vodakov
- C01 - INORGANIC CHEMISTRY
Information Patent Application
Method for growing low defect density silicon carbide
- Publication number 20020023581
- Publication date Feb 28, 2002
- Yury Alexandrovich Vodakov
- C01 - INORGANIC CHEMISTRY