I guess that's one perspective. For those that do want a list of the "big" companies, here are the ones that I recognize and thought of as "big names":
3M
Adobe Systems
Boston Scientific
Dolby Laboratories
The Dow Chemical Company
DuPont
Fairchild Semiconductor
Fairfield Crystal Technology
General Electric
IBM
IEEE-USA
Johnson & Johnson
Microsoft
Procter & Gamble
Qualcomm
Xerox Corporation
This is probably not a complete list, since I am not very tuned in and may not be familiar with the "big names" that others are.
Things like "Medical Device Manufacturers Association" probably count in that list as they exist solely as a lobbying group. http://www.medicaldevices.org/