Yes, patent is playable
...and is worth 10 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Patent" Definition
noun
A grant made by a government that confers on an individual fee-simple title to public lands.
A grant made by a government that confers upon the creator of an invention the sole right to make, use, and sell that invention for a set period of time.
An exclusive right or title.
An invention protected by such a grant.
adjective
Archaic Open to general inspection. Used especially of documents.
Biology Not blocked; open.
Biology Spreading open; expanded.
Obvious; plain. See Synonyms at apparent.
Of high quality. Used of flour.
verb-transitive
To grant a patent to or for.
To invent, originate, or be the proprietor of (an idea, for example).
To obtain a patent on or for (an invention, for example).
verb
To obtain or grant a patent right to.
To grant a privilege, right, or license to by patent.
To obtain or secure by patent.
To secure by letters patent exclusive right to make, use, or sell.
We love the game of Scrabble®, which is why we created Free Scrabble Dictionary - a simple lookup tool to check if the word you want to play is valid in the game of Scrabble®. At the top of every page, you can enter your word and click "Search Dictionary." We'll let you know whether your word is playable and provide a few definitions as well.