Trademark question

[Domain]

I was looking at a trademark registration that was eventually approved.

It indicates that the trademark was:
"APPROVED FOR REGISTRATION SUPPLEMENTAL REGISTER"

What is the SUPPLEMENTAL REGISTER? Does a trademark approved for the SUPPLEMENTAL REGISTER have "less" trademark strength? How does it differ from a normal trademark registration?

 

[Ovicide]

Here's an explanation posted by Dr. Berryhill several months ago:

...NOT EVERYTHING YOU FIND IN THE USPTO DATABASE IS A REGISTERED TRADEMARK ON THE PRINCIPAL REGISTER.

The "Supplemental Register" is a sort of trademark purgatory for applications which were deemed non-registrable due to descriptiveness. Descriptive marks might - *might* - someday be promoted to the Principal Register, after five years of exclusive use of the mark and submission of evidence that the mark, even though descriptive, has acquired distinctiveness as a trademark among the relevant consumers by virtue of the continuous exclusive use. Things on the Supplemental Register DO NOT carry the legal presumptions that marks on the Principal Register do.

Search the forums for "supplemental register".

http://www.dnforum.com/showthread.php?t=51963&highlight=supplemental+register