This is a list of notable companies that manufacture touch input devices or components.
Touchscreens
Capacitive 3M Alps Electric Corporation Atmel Cirque Cypress SCHURTER Input Systems Synaptics
Projected capacitive (PCAP) 3M Planar SCHURTER Input Systems Visual Planet Zytronic Surface acoustic wave (SAW) Planar
Bending wave 3M
Resistive
4-wire Planar SCHURTER Input Systems
5-wire SCHURTER Input Systems
Touchpads These manufacturers provide components to touchpads or trackpads.
Capacitive Alps Electric Corporation Cirque Synaptics Sensel
Resistive Interlink
References