Hi, I'm John Rizvi, the patent professor, a common question I get is whether you can file for a patent on a product that is already made, but that currently doesn't have a patent. Well, in order to file for a patent, you must be the inventor. Now if you find an existing product, and you modify it, or you apply it in a unique method, you might be considered the inventor and you can proceed with your own patent. You can also improve existing products. And if your improvement is seen as being new, useful, and it's not an obvious variation of what already exists, you could qualify for a patent. Some examples of obvious improvements that will not qualify are changes in size or changes in color or shape. Of course, if there is some obstacle that you're able to overcome by changing the size, for example, making a hearing aid significantly smaller, or if changing the shape or color allows you to overcome an obstacle that these improvements could be seen as being non obvious, and you still might qualify. If you're not sure if your improvement qualifies for a patent. Give me a call. I'm John Rizvi, the patent Professor.