Pretend you had a great idea. An idea that could change the world. Someone found out about your great idea and both of you made that idea come to life. However, you are not making as much sales compared to the thief. I don't know about you, but if for me, I would be the angriest person on earth. I'd sue this thief with every power I can possibly give. It was I who deserved the large sales, not the thief.
Sure, if you're talking about something you invented. That's what confirmed patents are for. In some parts of the world, designs are also protected by various legal means.
However, I think that you might be confusing making something popular, with inventing that something.
Apple did not invent touchscreen phones or flick scrolling or pinch zoom or rounded icons or apps or the green slanted phone icon.
Apple POPULARIZED some of those things, which is totally different from INVENTING them.
It's just like when Cadillac made fins popular in the 1950s and every other maker copied them. But Cadillac didn't invent them.
Regardless, nobody was doing these thing until Apple did. The general public didn't even become aware of touch gestures until 2008, which means that Apple deserves monopoly status.
Of course people were doing those things. Just not people YOU knew. Mass consumer ignorance does not provide legal protection.
That's why Apple got their pending trademark for "Multi-touch" taken away. Jeff Han's company wrote the Trademark Office and pointed out that the term and technology predated the iPhone by quite some time.