Invention Grant
- Patent Title: Fire-escape.
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Application No.: US1907371169Application Date: 1907-04-30
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Publication No.: US879439APublication Date: 1908-02-18
- Inventor: CAMPBELL JOHN W
- Applicant: CAMPBELL JOHN W
- Assignee: John W Campbell
- Current Assignee: John W Campbell
- Priority: US1907371169 1907-04-30
Information query
