中科微点-全球专利检索

  1. Login
  2. Sign Up
Invention Grant
US1087180A Apparatus for amplifying or detecting electrical variations. 失效
放大或检测电气变化的装置。

  • Patent Title: Apparatus for amplifying or detecting electrical variations.
  • Patent Title (中): 放大或检测电气变化的装置。
  • Application No.: US1913803358
    Application Date: 1913-11-26
  • Publication No.: US1087180A
    Publication Date: 1914-02-17
  • Inventor: PIERCE GEORGE W
  • Applicant: PIERCE GEORGE W
  • Assignee: George W Pierce
  • Current Assignee: George W Pierce
  • Priority: US1913803358 1913-11-26
Apparatus for amplifying or detecting electrical variations.
Information query
Espacenet
Patent Agency Ranking
0/0