In order to be registered as a patent agent or patent attorney in the United States, one must pass the United States Patent and Trademark Office registration examination.[1] This is a 100-question, six hour, multiple-choice test. The test is divided into morning and afternoon sections.

http://en.wikipedia.org/wiki/USPTO_registration_examination

Mr. Son is admitted to practice in the District of Columbia, California, United States Court of Appeals for the Federal Circuit, the United States Patent and Trademark Office and numerous United States district courts. He has handled disputes before the United States International Trade Commission.

http://www.foley.com/people/bio.aspx?employeeid=18232

I can find NO reference to him being a Patent Examiner.

Anthony H. Son, (Partner) admitted to bar, 1997, California; 1999, District of Columbia; registered to practice before U.S. Patent and Trademark Office. Education: University of Maryland, Baltimore County (B.S., Biochemistry and Molecular Biology, 1994); Benjamin N. Cardozo School of Law (J.D., 1997). Practice Areas: Intellectual Property; Litigation. Email: Anthony H. Son

Be well