Invention Grant
- Patent Title: One-way roller barrier for parking lot
- Patent Title (中): 停车场的单向滚筒屏障
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Application No.: US57704366Application Date: 1966-09-02
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Publication No.: US3376667APublication Date: 1968-04-09
- Inventor: PARR EDWARD L
- Applicant: THOMPSON WENDELL L
- Assignee: Thompson Wendell L
- Current Assignee: Thompson Wendell L
- Priority: US57704366 1966-09-02
- Main IPC: E01F13/10
- IPC: E01F13/10
Information query
