Invention Grant
- Patent Title: Photometric apparatus.
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Application No.: US1903177435Application Date: 1903-10-17
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Publication No.: US756963APublication Date: 1904-04-12
- Inventor: HOWELL JOHN W
- Applicant: GEN ELECTRIC
- Assignee: Gen Electric
- Current Assignee: Gen Electric
- Priority: US1903177435 1903-10-17
Information query
