Also in March 2017, you applied for a patent for a repair tool that Bob has fabricated to makes it easier to do certain repairs on small engines. The patent application had a cost of $500 and you paid a lawyer another $2,500 to help complete the necessary paperwork. On March 29, 2017, the government approved your patent application, protecting the tool for 20 years. You need to record the patent as an intangible asset and record amortization for March 2017. Similar to ESERs property, plant and equipment, you plan to record amortization expense if intangible assets are in use for any part of a month.