Patent attorney can be selected on some particular skills bases. A Patent attorney should be an engineer, and need to construct a patent document. Patent attorney should practiced patent law, and how may has drafted the inventions. A Patent attorney should have a background to the field of your invention. If you choose a patent attorney who can give you a quote for what the entire bill will be. They will have to inspect your invention first. Ask how the payments will be arranged. Educate yourself about the patent attorney process and you should understand as much as possible. Never deal with a sales person in choosing a patent attorney, you should deal directly deal with patent attorney. Trust you intuition and only choose a patent attorney who you feel understands your invention.