Which of the following statements concerning patents is correct?

  1. Legal costs incurred to successfully defend an internally developed patent should be capitalized and amortized over the patent’s remaining economic life.
  2. Legal fees and other direct costs incurred in registering a patent should be capitalized and amortized on a straight-line basis over a five-year period.
  3. Research and development contract services purchased from others and used to develop a patented manufacturing process should be capitalized and amortized over the patent’s economic life.
  4. Research and development costs incurred to develop a patented item should be capitalized and amortized on a straight-line basis over seventeen years.