Klarquist is well-known nationally and internationally for our work involving plant patents and related intellectual property matters. We are among a select few law firms in the United States that obtain a substantial number of plant patents each year for clients. The firm’s experience in this area extends over decades.

Klarquist represents a number of world-renowned growers and breeders of plants, ranging from flowering plants, such as roses, to fruit trees, ornamental trees, grasses, and shrubs. The firm has served these clients in obtaining plant patents and Plant Variety Protection Certificates in the United States, as well as working with foreign associates in assisting clients to obtain Plant Breeders’ Rights Certificates in foreign countries and regions. Klarquist prepares numerous license agreements and assignments for plant patent owners and assists clients in protecting trademarks for use in connection with plants.

View Our Team Members


David P. Petersen
Sheree L. Rybak, Ph.D


We represent our clients in all areas of plant protections:

  • Plant patents
  • Plant Variety Protection Certificates
  • Plant Breeders’ Rights Certificates
  • License agreements and assignments for plant patent owners
  • Protecting trademarks for use in connection with plants