• publisher: Washington : The Office : For sale by the Supt. of Docs., U.S. G.P.O.
  • creator: United States. Patent Office United States. Patent Office
  • contributor: United States. Patent Office.
  • Keyword: Patents United States Periodicals.
  • years: 1921-1974.
  • pages: 54 v. ;
  • class: T223
  • isbn: 0083-3037
  • download: pdf file