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Phone and Fax Numbers
(877) 878-USER or (877) 878-8737 (toll-free in USA)
(781) 780-5647 (toll and international calls)
Fax: (781) 780-5648
You can contact various PTC/USER departments via e-mail:
All correspondence should be addressed to:
330 N. Wabash Ave.
Chicago, IL 60611