The can opener was invented 48 years after the tin can. Well, that is quite a gap. I find it interesting that people were using hammers and chisels to open cans. Can openers invented 48 years after cans What does this mean? Certainly, the technology existed back then to create a can opener. Also, there was the need for one. Still, we had to wait almost 50 years. Maybe there are other inventions that we can use. All we need to do is create them and people will line up to buy em.