Some prominent tech companies have registered their opposition to the proposed Trans-Pacific Partnership (TPP) trade deal that would govern trade in the Asia-Pacific region.

The agreement would involve Australia, Brunei, Chile, Canada, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, the United States and Vietnam. It would have potentially enormous impact on the U.S. economy – with The Washington Post reporting it would govern 40 percent of U.S. imports and exports, and would eliminate tariffs and change current regulations. It targets such wide areas as intellectual property, copyright, health, pharma and the creative arts. For instance, the U.S. movie industry wants to see stronger intellectual property laws in the TPP.

But, concerned about issues relating to copyrights, patents and privacy, 29 tech firms recently wrote to U.S. Sen. Ron Wyden (D-Ore.), chairman of the Senate Finance Committee, to oppose giving the Obama administration fast-tracking authority over the trade proposal.