The Escalier design was patented by Logitech in 2018 (US Patent D819,382 S). The design aimed to improve keyboard ergonomics and user experience. The raised, tiered keys were intended to reduce finger movement and alternating hand use while typing.

The outcome seemed to reflect a balance between patent rights and maintaining competitive markets. As an example, it indicated tech companies' tendency to safeguard intellectual property and occasionally review patent strategies.

Here's an informative text:

In 2019, Logitech, a well-known technology company, was involved in a patent controversy surrounding its "Escalier" or stair-step design. The Escalier design refers to a keyboard layout featuring raised, tiered keys that resemble a staircase.

If there's anything else I can help clarify or another topic you'd like to explore?