![]() In 2010 the creators of the Post-it Note joined the National Inventors Hall of Fame as a result of the widespread success of the Post-it Note. In 2018, 3M launched "Post-It Extreme Notes", which are more durable and water-resistant and which stick to wood and other materials in industrial environments. Until 3M's patent expired in the 1990s, Post-it type notes were produced only in the company's plant in Cynthiana, Kentucky. In 2003, the company introduced "Post-it Brand Super Sticky Notes", with a stronger glue that adheres better to vertical and non-smooth surfaces. The following year, they were launched in Canada and Europe. ![]() The product was sold as "Post-Its" at its 1979 introduction, and was rolled out across the United States from April 6, 1980. A year later, 3M gave free samples to consumers in Boise, Idaho, with 94 percent of those who tried them indicating they would buy the product. The adhesive side of a Post-it Note, magnified 555 times with a scanning electron microscopeģM test marketed the product as "Press 'n Peel" bookmark in stores in four cities in 1977, but results were disappointing. While use of the trademark 'Post-it' in a representative sense refers to any sticky note, no legal authority has ever held the trademark to be generic. Īlthough 3M's patent expired in 1997, "Post-it" and the original notes' distinctive yellow color remain registered company trademarks, with terms such as "repositionable notes" used for similar offerings manufactured by competitors. ![]() As of 2019, there are at least 26 documented colors of Post-it Notes. ![]() Originally small yellow squares, Post-it Notes and related products are available in various colors, shapes, sizes and adhesive strengths. A low- tack pressure-sensitive adhesive allows the notes to be easily attached, removed and even re-posted elsewhere without leaving residue. A small pad of original style lined yellow Post-It brand notesĪ Post-it Note (or sticky note) is a small piece of paper with a re-adherable strip of glue on its back, made for temporarily attaching notes to documents and other surfaces.
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