The Teletype Corporation was an American manufacturer of teleprinters and other data and record communications equipment. A part of American Telephone and Telegraph Company's Western Electric manufacturing arm from 1930, it came into being in 1928 when the Morkrum-Kleinschmidt Company changed its name to the name of its trademark equipment.

Unlike its parent, Western Electric, Teletype had customers outside the Bell System, which it served with its own sales force. Its primary external customer was the United States Government.

The Teletype Corporation continued in this manner until January 8, 1982, the date of settlement of United States v. AT&T, a 1974 United States Department of Justice antitrust suit against AT&T. At that time, Western Electric was fully absorbed into AT&T as AT&T Technologies, and the Teletype Corporation became AT&T Teletype. The last vestiges of what had been the Teletype Corporation ceased in 1990.

The Teletype Corporation had its roots in the Morkrum Company. In 1902, electrical engineer Frank Pearne approached Joy Morton, head of Morton Salt, seeking a sponsor for Pearne's research into the practicalities of developing a printing telegraph system. Joy Morton needed to determine whether this was worthwhile and so consulted mechanical engineer Charles Krum, who was vice president of the Western Cold Storage Company, which was run by Morton’s brother Mark Morton. Krum was interested in helping Pearne, so space was set up in a laboratory in the attic of Western Cold Storage. Frank Pearne lost interest in the project after a year, and left to become a teacher at Armour Institute, now Illinois Institute of Technology. Krum was prepared to continue Pearne’s work, and in August 1903 a patent was filed for a "typebar page printer".

The present-day Pearne family disputes the claim that their ancestor lost interest, saying that Morton didn't pay him enough to support his family and that is why he left.^{[citation needed]} It is perhaps noteworthy that many of the engineering staff of Teletype were educated at Armour/IIT, beginning with Howard Krum.

In 1904, Krum filed a patent for a "type wheel printing telegraph machine" which was issued in August 1907.

In 1906, the Morkrum Company was formed, with the company name combining the Morton and Krum names and reflecting the financial assistance provided by Joy Morton. This is the time when Charles Krum's son, Howard Krum, joined his father in this work. It was Howard who developed and patented the start-stop synchronizing method for code telegraph systems, which made possible the practical teleprinter.

In 1908, a working teleprinter was produced, called the Morkrum Printing Telegraph, which was field tested with the Alton Railroad.