In what decade was the adhesive used in Post-it Notes accidentally discovered, though it took years before 3M finally launched the product commercially?

One of the most iconic office supplies we use today came from a failed experiment! Product innovation often happens through unexpected discoveries and persistence. This poll tests your knowledge about how certain everyday inventions came to market through unconventional paths. The story behind Post-it Notes exemplifies how 'failed' products can become billion-dollar successes when their unique properties are matched with the right application.

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1960s
1950s
1970s
1980s