Although preservation of food using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States.
Toidu konserveerimist plekktoosidesse kasutati juba 1772. aastal Hollandis, kuid esimesed konserviavajad patenteeriti alles 1855. aastal Inglismaal ja 1858 USA-s.