Invention Grant
- Patent Title: Lubricated plug valve
- Patent Title (中): 润滑塞阀
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Application No.: US24399427Application Date: 1927-12-31
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Publication No.: US1888207APublication Date: 1932-11-22
- Inventor: NORWOOD BARD FRANCIS
- Applicant: WALWORTH PATENTS INC
- Assignee: Walworth Patents Inc
- Current Assignee: Walworth Patents Inc
- Priority: US24399427 1927-12-31
- Main IPC: F16K5/22
- IPC: F16K5/22
Information query
