The closest trademark to the group's own project is that of a metal filter air frame. The trademark is SNAP-TOGETHER, and it was registered by CARDINAL MANUFACTURING COMPANY.
https://verimark.com/trademark/snap-together-88675617
The most similar patent to Snap Together's proposed deign is the Modal Effects Disruptor Modular Pedal. This effects pedal allows the user to use a variety of different gain adjustment effects, and remove or take a given effect if the user decides. It does not utilize snap circuit technology like Snap Together's proposed design, however, it does feature a similar level of physical customization of effects. Fortunately, since the design of the Modal Effects Disruptor Modular Pedal is so different than Snap Together, there should not be any conflict of patents.
https://www.kickstarter.com/projects/modaleffects/introducing-disruption