Patents Assigned to P. C. M. Olsthoorn Holding BV
  • Spathiphyllum plant named ‘Sweet Roberta’
    Patent number: PP18372
    Abstract: A new cultivar of Spathiphyllum plant named ‘Sweet Roberta’ that is characterized by white spathes, green leaves and a large overall size.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: December 25, 2007
    Assignee: P. C. M. Olsthoorn Holding BV
    Inventor: Petrus C. M. Olsthoorn