Which creatures are owned by D&D?

[Elbows]

So I was playing a rather enjoyable dungeon crawl last night and started jotting down some notes to further develop it.  Which dungeon beasties are trademarked by Dungeons and Dragons, etc?

The only ones I question in my personal collection are Bugbears and Owlbears --- are they property of D&D?  Does anyone have a link to help identify others I can avoid?  Thanks in advance!

[Furt]

Here you go mate I think this is what you want?

http://www.giantitp.com/forums/archive/index.php/t-121509.html

beholder
gauth
carrion crawler
displacer beast
githyanki
githzerai
kuo-toa
mind flayer
slaad
umber hulk
yuan-ti

[aiteal]

Mindflayer