Invention Grant
- Patent Title: Method for forming spiral lamp tubes
- Patent Title (中): 形成螺旋灯管的方法
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Application No.: US8579061Application Date: 1961-01-30
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Publication No.: US3129085APublication Date: 1964-04-14
- Inventor: OLSEN ANDREW H , TRUTNER DONALD G
- Applicant: DURO TEST CORP
- Assignee: Duro Test Corp
- Current Assignee: Duro Test Corp
- Priority: US8579061 1961-01-30
- Main IPC: C03B23/051
- IPC: C03B23/051 ; H01J9/24
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