Vincent, I assume all of these products are Homelink compatible. RF devices that aren't Homelink won't work. Issue has less to do with FCC, from what I am told, and more to do with presumed intellectual property.

A while ago Chamberlain (a huge garage-door opener company and owner of AMX, Chief, Sanus) sued Skylink under the Digital Millennium copyright Act (DMCA) for their RF learning product. It was totally ludicrous and they lost.

There have been similar suits in the RF world.

Perhaps Chamberlain and others are playing the safety card. It is illegal to automate a garage door to close, without the user being in line of sight (I know, you all automate these things but it currently is illegal)

Inside of the home, IR is the pervasive protocol, which is why so many co's make IR learning products. RF is still rare, except for garage door openers, so mfrs may not see an opportunity in commercial RF learning products.

more on Chamberlain vs. Skylink "abuse of DMCA"
[Link: eff.org]