Invention Grant
- Patent Title: Pneumatic tube
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Application No.: US64223723Application Date: 1923-05-29
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Publication No.: US1564397APublication Date: 1925-12-08
- Inventor: ARMSTRONG GEORGE F
- Applicant: ARMSTRONG GEORGE F
- Assignee: George F Armstrong
- Current Assignee: George F Armstrong
- Priority: US64223723 1923-05-29
- Main IPC: B60C5/04
- IPC: B60C5/04
Information query
