Invention Grant
- Patent Title: Manhole
- Patent Title (中): 人孔
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Application No.: US15044226Application Date: 1926-11-24
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Publication No.: US1639495APublication Date: 1927-08-16
- Inventor: FRAME WILLIAM S
- Applicant: FRAME WILLIAM S
- Assignee: William S Frame
- Current Assignee: William S Frame
- Priority: US15044226 1926-11-24
- Main IPC: E02D29/14
- IPC: E02D29/14
Public/Granted literature
- US09530484B1 Semiconductor apparatus and semiconductor system including the same Public/Granted day:2016-12-27
Information query
