Stylographic, or technical, pens, have been with us for many years but filled a small part of the fountain pen market. Using a thin tube with an inserted wire to manage ink flow, instead of a nib and feed, stylographics were perfectly suited for technical drawing and numbers, but not for writing that was not fully vertical.
There have been two prominent firms in this nichel — Ink-o-Graph from the 1920s-1940s, and Koh-I-Noor's Rapidograph was the 1950's on.
The Ink-o-Graphs were made by the Ink-o-Graph Company starting in the mid-1920's. The earlier models appear to be made of bakelite, an early plastic that was frequently used in electrical fixtures and small appliances because it was inexpensive and easy to form; however, it was not used often in pens.