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Invention Grant
US730769A Car-journal bearing. 失效
CAR-JOURNAL轴承。

  • Patent Title: Car-journal bearing.
  • Patent Title (中): CAR-JOURNAL轴承。
  • Application No.: US1903139588
    Application Date: 1903-01-19
  • Publication No.: US730769A
    Publication Date: 1903-06-09
  • Inventor: HOPKINS JAMES M
  • Applicant: HOPKINS JAMES M
  • Assignee: James M Hopkins
  • Current Assignee: James M Hopkins
  • Priority: US1903139588 1903-01-19
Car-journal bearing.
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