Patents by Inventor Douwe Renkema

Douwe Renkema has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Abandonment and recovery head apparatus
    Patent number: 7182550
    Abstract: An abandonment and recovery head apparatus comprises a head member. A lift member is moveably coupled to the head member. A retaining device is operable to hold the lift member in an accessible position.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: February 27, 2007
    Assignee: Heerema Marine Contractors Nederland B.V.
    Inventor: Douwe Renkema
  • Abandonment and recovery head apparatus
    Publication number: 20050265788
    Abstract: An abandonment and recovery head apparatus comprising a head member, a lift member moveably coupled to the head member, and a retaining device operable to hold the lift member in an accessible position.
    Type: Application
    Filed: May 26, 2004
    Publication date: December 1, 2005
    Applicant: Heerema Marine Contractors Nederland B.V.
    Inventor: Douwe Renkema