Invention Grant
- Patent Title: Revolving-door structure.
- Patent Title (中): 改造门结构。
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Application No.: US1900009949Application Date: 1900-03-23
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Publication No.: US711803APublication Date: 1902-10-21
- Inventor: KANNEL THEOPHILUS VAN
- Applicant: KANNEL REVOLVING DOOR COMPANY VAN
- Assignee: Kannel Revolving Door Company Van
- Current Assignee: Kannel Revolving Door Company Van
- Priority: US1900009949 1900-03-23
Information query
