Invention Grant
- Patent Title: Blotting-ruler.
- Patent Title (中): BLOTTING-RULER。
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Application No.: US1905244903Application Date: 1905-02-09
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Publication No.: US811311APublication Date: 1906-01-30
- Inventor: MACKENZIE GEORGE W
- Applicant: MACKENZIE GEORGE W
- Assignee: George W Mackenzie
- Current Assignee: George W Mackenzie
- Priority: US1905244903 1905-02-09
Information query
