Here's a link to a recently published paper - "Using Spatiotemporal Modulation to Draw Tactile Patterns in Mid-Air" - https://link.springer.com/chapter/10.1007/

Here's a link to a recently published paper - "Using Spatiotemporal Modulation to Draw Tactile Patterns in Mid-Air" - https://link.springer.com/chapter/10.1007/978-3-319-93445-7_24 https://link.springer.com/chapter/10.1007/978-3-319-93445-7_...