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Invention Grant
US3310124A Method and apparatus of excavation 失效
挖掘方法和装置

  • Patent Title: Method and apparatus of excavation
  • Patent Title (中): 挖掘方法和装置
  • Application No.: US35934364
    Application Date: 1964-04-13
  • Publication No.: US3310124A
    Publication Date: 1967-03-21
  • Inventor: FARMER JOHN T
  • Applicant: FARMER JOHN T
  • Assignee: John T Farmer
  • Current Assignee: John T Farmer
  • Priority: US35934364 1964-04-13
  • Main IPC: E21D1/06
  • IPC: E21D1/06
Method and apparatus of excavation
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