Invention Grant
- Patent Title: Quartz working
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Application No.: US63301823Application Date: 1923-04-18
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Publication No.: US1544293APublication Date: 1925-06-30
- Inventor: BERRY EDWARD R
- Applicant: GEN ELECTRIC
- Assignee: Gen Electric
- Current Assignee: Gen Electric
- Priority: US63301823 1923-04-18
- Main IPC: C03B5/16
- IPC: C03B5/16 ; C03B19/00 ; C03B20/00
Information query
