Considering the last comment on github, the patent office would probably deny the application.
https://drive.google.com/viewerng/viewer?url=patentimages.st...
Searching on the USPTO website returns no related patents:
http://patft.uspto.gov/netahtml/PTO/search-bool.html
The indication, to me, is that the patent has not made it past the application process.
Systems such as this, however, have enjoyed patent protection in the past (Soundex, notably), and his own metaphone and double metaphone systems are cited in several other patents. Google patent search is your friend here.
Snarky comment: The USPTO has a habit of not denying any applications.
[0] : https://github.com/threedaymonk/text/issues/21#issuecomment-...