9. Post It
Those small sticky notes that you fill your desk with at work, trying to remember everything you need to do in a given day, are usually referred to as “Post-its” or “Post-it notes.” Here’s the thing though, if you haven’t bought them from 3M, the company that owns the brand, you’re just using sticky notes.
The low-tack adhesive notes were invented back in the 70s and the company was quick to register Post-it as a trademark. The patent ran out nearly 20 years ago, but the yellow colored notes remain registered company trademark.
