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Rulletrapp (Norwegian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Rulletrapp" in Norwegian language version.

refsWebsite
Global rank Norwegian rank
2uspto.gov
1,459th place
2,928th place

uspto.gov

  • Ames, N. "Revolving Stairs," U. S. Patent 25076. 9. august 1859. Tilgjengelig hos: http://uspto.gov
  • Reno, Jesse W. "Endless Conveyer or Elevator," U. S. Patent 47091815. Mars 1892. Tilgjengelig hos: http://uspto.gov