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Invention Grant
US1427682A Cork substitute and process of manufacture 失效
软木替代品和制造工艺

  • Patent Title: Cork substitute and process of manufacture
  • Patent Title (中): 软木替代品和制造工艺
  • Application No.: US35144020
    Application Date: 1920-01-14
  • Publication No.: US1427682A
    Publication Date: 1922-08-29
  • Inventor: GRAHAM EMMA E
  • Applicant: GRAHAM EMMA E
  • Assignee: Emma E Graham
  • Current Assignee: Emma E Graham
  • Priority: US35144020 1920-01-14
  • Main IPC: B27K5/06
  • IPC: B27K5/06
Cork substitute and process of manufacture
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