Sometimes when you’re inventing you can let your emotions get the best of you. Basically what this means is that you have seen an idea and you like it but want to improve on it. In a sense, you are reinventing something that really already exists. You may in fact run into some issues if you try and do this without the original owner’s permission, especially if there is a patent on it. Maybe your new idea for an old product is great. Maybe it will revolutionize something that already does exist. You do need to really be careful when approaching a situation like this though. Also try to stay unbiased and willing to let it go if it is just an emotional attachment to an idea. There’s always a new idea just around the corner.