Patents by Inventor Douglas A. Hartwell

Douglas A. Hartwell 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).

  • Convertible child carrier
    Patent number: 9314111
    Abstract: A child carrier worn on the back of a user for supporting and transporting a child includes a child seating and back support portion, an adjustable waist belt portion, two adjustable padded shoulder straps, a dual-adjustable cross-chest sternum strap, and two infant/child leg restraint straps. The child carrier is compliant to support the child from bottom, rear and side. The carrier may use shoulder and waist straps constructed of 3d air mesh fabric to provide adequate support and comfort, which enables the child carrier to be compressed into a small sack for stowage and transport in a pocket or other location.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: April 19, 2016
    Assignee: BityBean LLC
    Inventors: Douglas A Hartwell, James H Sadler
  • Convertible Child Carrier
    Publication number: 20140084037
    Abstract: A child carrier worn on the back of a user for supporting and transporting a child includes a child seating and back support portion, an adjustable waist belt portion, two adjustable padded shoulder straps, a dual-adjustable cross-chest sternum strap, and two infant/child leg restraint straps. The child carrier is compliant to support the child from bottom, rear and side. The carrier may use shoulder and waist straps constructed of 3d air mesh fabric to provide adequate support and comfort, which enables the child carrier to be compressed into a small sack for stowage and transport in a pocket or other location.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 27, 2014
    Applicant: BityBean LLC
    Inventors: Douglas A Hartwell, James H Sadler
  • Viscous liquid applicator
    Patent number: 5964380
    Abstract: The invention features an applicator for delivering a defined, adjustable quantity of a viscous liquid, in a short stream. The applicator can be used, for example, to accurately and easily apply oil to ears of sweet corn to prevent infestation by corn earworms.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: October 12, 1999
    Assignees: University of Massachussets, Trustees of Hampshire College
    Inventors: Ruth V. Hazzard, Ellen D. Siedlecki, Brian B. Schultz, Douglas A. Hartwell