Spirit duplicator (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Spirit duplicator" in English language version.

Last modified:

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1900s.org.uk (Global: low place; English: low place)

books.google.com (Global: 3rd place; English: 3rd place)

chicagotribune.com (Global: 143rd place; English: 80th place)

blogs.chicagotribune.com

doi.org (Global: 2nd place; English: 2nd place)

espacenet.com (Global: 950th place; English: 813th place)

worldwide.espacenet.com

  • Patent US1645930A: Process for multiplying records. Registered on March 25, 1925, published on October 18, 1927, inventor: Wilhelm Ritzerfeld.

naszemiasto.pl (Global: 2,115th place; English: 6,824th place)

szczecin.naszemiasto.pl

patents.google.com (Global: 1,154th place; English: 606th place)

radioszczecin.pl (Global: low place; English: low place)

rmf24.pl (Global: 4,502nd place; English: low place)

um.szczecin.pl (Global: low place; English: low place)

uspto.gov (Global: 2,155th place; English: 1,380th place)

pdfpiw.uspto.gov

  • U.S. 2,254,469, Bjorksten, Johan, "Nonflammable Solvent", published September 2, 1941, assigned to Ditto, Incorporated[dead link]

web.archive.org (Global: 1st place; English: 1st place)

worldcat.org (Global: 4th place; English: 4th place)

search.worldcat.org