Invention Grant
US3450997A Parametric apparatus employing elemental tellurium or selenium or both
失效
使用元素碲或硒或二氧化碳的参数设备
- Patent Title: Parametric apparatus employing elemental tellurium or selenium or both
- Patent Title (中): 使用元素碲或硒或二氧化碳的参数设备
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Application No.: US3450997DApplication Date: 1968-04-29
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Publication No.: US3450997APublication Date: 1969-06-17
- Inventor: PATEL CHANDRA K N
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US73318968 1968-04-29
- Main IPC: G02F1/39
- IPC: G02F1/39 ; H03F7/00 ; H03D9/00
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