Invention Grant
- Patent Title: Device for comparing luminous areas.
- Patent Title (中): 用于比较LUMINOUS地区的装置。
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Application No.: US1904218519Application Date: 1904-07-28
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Publication No.: US815865APublication Date: 1906-03-20
- Inventor: RYAN WALTER D A
- Applicant: GEN ELECTRIC
- Assignee: Gen Electric
- Current Assignee: Gen Electric
- Priority: US1904218519 1904-07-28
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