This quote is from a 1996 letter written by then-Register of Copyright Marybeth Peters to Senator Orrin Hatch of the Senate Judiciary Committee about why the Copyright Office belongs in the Library of Congress:
Put simply, copyright differs from industrial property in fundamental respects. Most other countries, like the United States, have recognized this difference, handling copyright issues in their ministries of culture or education, and patent and trademark issues in their ministries of commerce or trade. While copyright, like industrial property, has important commercial value, it also has a unique influence on culture, education, and the dissemination of knowledge. It is this influence that logically connects copyright to the Library of Congress in contributing to the development of our nation’s culture.