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Invention Grant
US1079352A Vacuum-tight seal. 失效
真空密封。

  • Patent Title: Vacuum-tight seal.
  • Patent Title (中): 真空密封。
  • Application No.: US1913752318
    Application Date: 1913-03-06
  • Publication No.: US1079352A
    Publication Date: 1913-11-25
  • Inventor: KEYES FREDERICK G
  • Applicant: ARTHUR A NOYES
  • Assignee: Arthur A Noyes
  • Current Assignee: Arthur A Noyes
  • Priority: US1913752318 1913-03-06
Vacuum-tight seal.
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