how much does it cost to get a patent attorney
$400 per hour. Hourly fee charged by attorney to write a patent. âOnce a patent lawyer has enough information about the invention, he or she files a patent application, which takes an average of 25 hours to write and costs about $10,000.â $10,000/25 hours = $400/hour. IP attorney fees.5 hours. Average time it takes for an attorney to write a patent. âOnce a patent lawyer has enough information about the invention, he or she files a patent application, which takes an average of 25 hours to write and costs about $10,000.â $10,000/25 hours = $400/hour. IP attorney fees. Hours to write patent.