A trust is a private legal construct (in this case established under the laws of Virginia, USA) allowing assets (in this case, intellectual property rights and other property) to be held and administered for specific purposes (in this case, for the benefit of the IETF and hence the Internet standards process). A Trust is normally managed by a set of Trustees who are obliged to follow the terms of the Trust Agreement.
Here’s how to contact the Trustees:
5177 Brandin Ct
Fremont, CA 94538