Their propulsion control equipment was supplied by an Austrian company, Elin EBG Traction, and braking systems by Knorr, under subcontracts.

[4] Škoda 10T cars that had been ordered in 2000 or 2001 were delivered by Inekon to Portland and Tacoma in 2002, which was already after the Škoda-Inekon joint venture had effectively been dissolved.

Oregon Iron Works (OIW), a specialized manufacturing company based in Clackamas, Oregon (an unincorporated community in the southeastern suburbs of Portland), signed an exclusive technology transfer agreement with Škoda in February 2006,[6] and in January 2007 it was awarded a contract to build one 10T streetcar for the Portland Streetcar system.

[9] The prototype US-built 10T was presented to the public and media at a ceremony held on 1 July 2009 in Portland,[10] but it did not enter service until September 2012,[11][12] delayed first by problems that came to light during acceptance testing and later by a decision to replace its propulsion-control system with a new one built by a US company, in order to increase the US content.

Its tramcar manufacturing facilities in Oregon were repurposed by its parent company, OIW,[25] and United Streetcar was formally dissolved in December 2018.