Minister of Interior and shall examine and report on all applications
for patents and shall receive for such services a fee of twenty dollars
for each application examined and reported by him, which fee shall be
paid by the applicant in advance. In addition to this fee the following
fees shall be charged all applicants for patents, upon filing each
original application for a patent, five dollars; and upon issuing a
patent, five dollars; and five dollars shall be charged for the filing
of a _caveat_.