The above image shows an excerpt from the 1995 Stratasys patent, covering the drawings of FDM layers, including brick layers. This covered all such ways of printing, but the patent expired in 2016.

There is an image of the brick feeder on an existing excavator that frankly looks photoshopped. And some real images like the one seen here and another of the “print head” holding some bricks.

Leveraging a custom 3D glass printing technology from MIT spinoff Evenline, the team has developed robust, multilayered glass bricks shaped like figure eights. These bricks are designed to ...