Impression Pads, Force Pads & Devices

Psypher, 

Nomad, 

Tommy Pad, 

Parapad, 

John Riggs Butterfly Pad

https://www.thejerx.com/blog/2016/9/15/jerx-on-your-side-forcing-pads

http://magikdata.com/products-us.html

https://www.google.com/books/edition/Devious_Contraptions/2D_6DQAAQBAJ?hl=en&gbpv=1&dq=impression+pads+mentalism&printsec=frontcover