Invention Grant
- Patent Title: Viewing device for vacuum apparatus
- Patent Title (中): 真空设备观察装置
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Application No.: US31631863Application Date: 1963-10-15
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Publication No.: US3224428APublication Date: 1965-12-21
- Inventor: WALTER DIETRICH , FRIEDRICH KRALL
- Applicant: HERAEUS GMBH W C , DEGUSSA
- Assignee: Evonik Degussa GmbH,WC Heraus GmbH
- Current Assignee: Evonik Degussa GmbH,WC Heraus GmbH
- Priority: DEH0047342 1962-11-07
- Main IPC: B01J3/00
- IPC: B01J3/00 ; C23C14/52 ; F27D21/02
Information query
