I. Copyright

Copyright (C) 2008 - 2009 Novell, Inc.
Copyright (C) 2009 Red Hat, Inc.
ModemManager code is Licensed under GPL version 2 (or any later version).
See: /usr/share/common-licenses/GPL-2 

ModemManager is maintained at http://cgit.freedesktop.org/ModemManager/ModemManager/
The git repository used to export from can be cloned by:
git://anongit.freedesktop.org/ModemManager/ModemManager

Some files have an additional copyright holder:
 ./plugins/mm-modem-mbm.h: Copyright (C) 2008 Ericsson AB
 ./plugins/mm-modem-mbm.c: Copyright (C) 2008 Ericsson AB
 ./plugins/mm-plugin-mbm.c: Copyright (C) 2008 Ericsson AB
 ./plugins/mm-plugin-mbm.h: Copyright (C) 2008 Ericsson AB
 ./doc-generator.xsl: Copyright (C) 2006, 2007 Collabora Limited

Some files are governed under the more liberal LGPL-2.1 (or any later version)
that can be found in /usr/share/common-licenses/LGPL-2.1:
 ./doc-generator.xsl: LGPL-2.1 (or any later version)

II. Packaging Copyright

Packaging is (C) 2009 Canonical Ltd.
and licensed under the GPL version 3 (or any later version).
See: /usr/share/common-licenses/GPL

The url of the packaging bzr branch is documented in debian/control