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Invention Grant
US796652A Metal car-door. 失效
金属车门。

  • Patent Title: Metal car-door.
  • Patent Title (中): 金属车门。
  • Application No.: US1904237337
    Application Date: 1904-12-17
  • Publication No.: US796652A
    Publication Date: 1905-08-08
  • Inventor: HOPKINS JAMES M
  • Applicant: HOPKINS JAMES M
  • Assignee: James M Hopkins
  • Current Assignee: James M Hopkins
  • Priority: US1904237337 1904-12-17
Metal car-door.
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