Spencer F. Silver, a inventor for 3M.
12meters
3m
9m + 9m + 3m + 3m = 24m
5m+3=3m+9 5m+3-3=3m+9-3 5m=3m+6 5m-3m=3m+6-3m 2m=6 (2m)/2=6/2 m=3
Postit notes are made by 3M, a Minnesota, USA company.
1977
The first Post-it Notes were sold in 1980 by 3M. They were invented by Spencer Silver in 1968, but it wasn't until 1980 that they were officially launched as a product.
Spencer F. Silver, a inventor for 3M.
The product was launched by 3M in 1977:
post it notes
utility
1977 a trial was underwent by 3M secretaries, went into stores and failed. Remarketed in 1980 and still here
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Post-It notes
Spencer Silver invented the adhesive used in Post-it notes in 1968 while working for 3M. Arthur Fry later developed the idea of using the adhesive for sticky notes in 1974, leading to the official launch of Post-it notes in 1980.