Patents by Inventor Michael Cardwell

Michael Cardwell 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).

  • Automatic retractable hatch guard
    Patent number: 8555555
    Abstract: An automatic retractable hatch guard provides enhanced safety and security to hatch openings and comprises retractable assistive handrails and a retractable access step that retracts to fit within a hatch opening and beneath a hatch cover and automatically extends upwards and beyond the hatch opening.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: October 15, 2013
    Inventor: Michael Cardwell
  • Automatic Retractable Hatch Guard
    Publication number: 20110232201
    Abstract: An automatic retractable hatch guard provides enhanced safety and security to hatch openings and comprises retractable assistive handrails and a retractable access step that retracts to fit within a hatch opening and beneath a hatch cover and automatically extends upwards and beyond the hatch opening.
    Type: Application
    Filed: March 28, 2011
    Publication date: September 29, 2011
    Inventor: Michael Cardwell
  • Hatch cover manager
    Patent number: 7638962
    Abstract: The hatch cover manager product monitors hatch cover conditions and can move the cover to a closed position when the cover is left open and the hatch opening is not in use. The product minimizes the probability that the person using the walking surface will accidentally step into the uncovered hatch opening and fall to the surface below.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: December 29, 2009
    Inventor: Michael Cardwell
  • Hatch Cover Manager
    Publication number: 20070241709
    Abstract: The hatch cover manager product monitors hatch cover conditions and can move the cover to a closed position when the cover is left open and the hatch opening is not in use. The product minimizes the probability that the person using the walking surface will accidentally step into the uncovered hatch opening and fall to the surface below.
    Type: Application
    Filed: April 12, 2007
    Publication date: October 18, 2007
    Inventor: Michael Cardwell