United States Patent and Trademark Office

The US Patent and Trademark Office is part of the Department of Commerce.

In the United States, only the United States Patent & Trademark Office. In other nations, the appropriate national counterpart of the USPTO.

Cheryl H. Agris has written:

'Practitioner's patent guidelines' -- subject(s): United States, United States. Patent and Trademark Office, Patent practice, Rules and practice

Searching the United States Patent and Trademark Office website, I found three patents related to Vocaloid. The earliest patent was filed in February of 2005.