Invention Grant
- Patent Title: Pneumatic elevator-door controller.
- Patent Title (中): 气动电梯门控制器。
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Application No.: US1912707495Application Date: 1912-07-03
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Publication No.: US1064847APublication Date: 1913-06-17
- Inventor: MILLS EDWARD N
- Applicant: WESTERN DOOR CONTROL COMPANY
- Assignee: Western Door Control Company
- Current Assignee: Western Door Control Company
- Priority: US1912707495 1912-07-03
Information query
