The donor, Sebastian J. Tralongo (1928–2007), served in the U.S. Navy during World War II and then worked for the Vitro Corporation in Rockville, Md., for 35 years. He patented a device for signaling ...

3Doodler’s 3D printing pens aren’t just for enthusiasts and students. The company has introduced the 3Doodler Pro+, a “professional-grade” pen aimed at everyone from artists to engineers.

The Scribble pen proposed a near-identical concept on Kickstarter back in 2014, before cancelling the campaign after bagging more than $360,000 (£270,000, €320,000) in funding.

The ink is then saved to an internal memory bank, which can hold over 100,000 unique colors. Related: 3Doodler: World’s First ‘3D-Printing Pen’ Lets You Draw Designs in Thin Air!