Ice removal device

[mattd]

Oh boy.  We've got some concepts mixed up.  There is no copyright infringement issue here - wipe that out of your mind.  IF someone else has patented a feature of your device, you can't build it even if you are using it in another way.  But, enforcing patents is an expensive PITA so if its just detector guy and his DIY ice picker, I doubt you would have any problems.

Now, if this is something you plan to market and want to spend the money on getting a patent - do not discuss it in public.  From the time you disclose it or offer one for sale, you have 1 year to file for a patent.  Be careful of that clock.  There is some pending legislation that might change this grace period, but as of right now, that is the law.