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Invention Grant
US941858A Heat-retainer. 失效
热保护器

  • Patent Title: Heat-retainer.
  • Patent Title (中): 热保护器
  • Application No.: US1909473482
    Application Date: 1909-01-21
  • Publication No.: US941858A
    Publication Date: 1909-11-30
  • Inventor: DANIELS FRED H
  • Applicant: DANIELS FRED H
  • Assignee: Fred H Daniels
  • Current Assignee: Fred H Daniels
  • Priority: US1909473482 1909-01-21
Heat-retainer.
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