Invention Grant
- Patent Title: Oil-bath rotary swivel.
- Patent Title (中): 油浴旋转SWIVEL。
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Application No.: US17219917Application Date: 1917-06-01
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Publication No.: US1259854APublication Date: 1918-03-19
- Inventor: GREVE EDGAR E
- Applicant: OIL WELL SUPPLY CO
- Assignee: Oil Well Supply Co
- Current Assignee: Oil Well Supply Co
- Priority: US17219917 1917-06-01
Public/Granted literature
- US11545751B2 Ultra-wideband antenna for reversible electronic device Public/Granted day:2023-01-03
Information query
