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Invention Grant
US790800A Metal seal or lock. 失效
金属密封或锁定。

  • Patent Title: Metal seal or lock.
  • Patent Title (中): 金属密封或锁定。
  • Application No.: US1904197153
    Application Date: 1904-03-08
  • Publication No.: US790800A
    Publication Date: 1905-05-23
  • Inventor: MERRILL FRANK E
  • Applicant: MERRILL FRANK E
  • Assignee: Frank E Merrill
  • Current Assignee: Frank E Merrill
  • Priority: US1904197153 1904-03-08
Metal seal or lock.
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