a4a5eaed_semiconductor______Patents_com__Description
[Patent #] 2011/0174259 [Description] 
METHOD FOR PRODUCTION OF VALVE HEAD PORTION OF HOLLOW ENGINE VALVE AND HOLLOW ENGINE VALVE Forming of a valve head portion (1) of a hollow engine valve (V) comprising a material particularly satisfactory in heat resistance is performed by cold...
Applications filed at Jul 21 2011 | Method for producing nitride semiconductor laser light source and apparatus for producing nitride semiconductor... | Patents.com