Invention Grant
- Patent Title: Double twist spindle
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Application No.: US17885350Application Date: 1950-08-11
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Publication No.: US2641896APublication Date: 1953-06-16
- Inventor: KARL LANDOLT
- Applicant: KARL LANDOLT
- Assignee: Landolt Karl
- Current Assignee: Landolt Karl
- Priority: CH722404X 1949-10-11
- Main IPC: D01H7/86
- IPC: D01H7/86
Public/Granted literature
- US20220383744A1 TRAFFIC LIGHT RELEVANCY Public/Granted day:2022-12-01
Information query
