>>>Hello Everybody
>>>
>>
><snip>
>
>>>Second do I have to do anything else before selling a product? like a paten or something???
>>
>>You should, at a minimum, file a copyright notice. I suggest you contact a good computer law attorney to help with writing your license agreement, etc.
>>
>Can someone fill in a gap in my knowledge: in the US do you have to register before copyright comes into force, or is it just something you can do to be safe?
>
>Les

No, registration is not required. The instant the first code is entered on the keyboard, the copyright begins. However, should you ever need to enforce the copyright, it will be easier if it's registerd.