registered trademark

20 LETTERS · STARTS WITH R

registered trademark is a valid 20-letter word worth 28 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1G2I1S1T1E1R1E1D2T1R1A1D2E1M3A1R1K5

1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 1 + 2 + 1 + 3 + 1 + 1 + 5 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does registered trademark mean?