US National Stage


tools and resources for Global inventors, whether from the US, Canada,
Europe, the Middle East, Australia, Polynesia, Asia, or the Americas

Patent Code Formats


All patent numbers are seven characters in length, excluding commas, which are optional. Examples of each type of patent numbers are listed below for your reference;


Utility3,871,817 6923014 0000001
DesignD911,456 D319287 D000152
PlantPP08,292 PP02914 PP00003
ReissueRE69,546 RE11089 RE00002
Defensive PublicationT104,898 T891829 T100006
Statutory Invention RegistrationH001,589 H001987 H000004
Re-examinationRX45
Additional ImprovementAI00,487 AI000898 AI00006
Da Vinci Partners LLC, offering DA VINCI*™ services, for global leaders in innovation.
Offering ®** legal, ® and ®*** services, for our clients active in China.
*service mark covering our legal and IP services, including IP valuation services registered in Switzerland, Europe, the USA, and Canada, other countries/regions pending.
** service marks covering legal services and IP services on Chinese IP issues, registered in Switzerland, Europe, Korea, and the USA
*** service marks covering IP services involving China, registered in China, Switzerland, and the USA