One of the three Teletype manufacturing buildings in Skokie, Illinois remains in use as a parking garage for a shopping center.

Krum was interested in helping Pearne, so space was set up in a laboratory in the attic of Western Cold Storage.

Krum was prepared to continue Pearne’s work, and in August 1903 a patent was filed for a "typebar page printer".

It was Howard who developed and patented the start-stop synchronizing method for code telegraph systems, which made possible the practical teleprinter.

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

The type-bar printer was intended for use on multiplex circuits, and its printing was controlled from a local segment on a receiving distributor of the sunflower type.

The TT-47/UG was the first Model 28 KSR, and while Teletype's designation for the basic machine remained the same over the next 20+ years, the TT-47/UG took on suffixes to identify the specific version.

The U.S. Navy also assigned some "set" designations using the standard Army/Navy system, such as the AN/UGC-5, a Teletype Model 28 ASR which has a keyboard, printer, tape punch and reader facilities all in one cabinet.