A patent is granted to you by the Government of Canada. It gives you the right to exclude others from making, using or selling your invention. Your Canadian patent applies within Canada for 20 years from the date you file the application. Generally speaking, the patent application is available to the public 18 months after you file it. Patents cover new inventions (processes, machines, products, compositions of matter) or any new, non-obvious and useful improvement to an existing invention.