Before revision: Dokorder was a brand of tape recorder from Japanese electronics company Denki Onkyo (not related to the Onkyo audio company) that included a four-reel transport system called "Dub-A-Tape" capable of feeding two different tapes through the same tape head assembly and, in the process, recording a duplicate of a tape.
After revision: Dokorder was a brand of tape recorder from Japanese electronics company Onkyo that featured a four-reel transport system reel-to-reel capable of feeding two different tapes through the same tape head assembly and, in the process, recording a duplicate of a tape.