Method and apparatus for manufacturing thoriated filament devices,申请号US19360057474-传众专利搜索

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发明名称	Method and apparatus for manufacturing thoriated filament devices
摘要
申请公布号	US2057098(A)	申请公布日期	1936.10.13
申请号	US19360057474	申请日期	1936.01.04
申请人	HYGRADE SYLVANIA CORPORATION	发明人	HOFFMAN RAYMOND R.
分类号	H01J9/04	主分类号	H01J9/04
代理机构		代理人
主权项
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