Patents by Inventor Albert Lindqvist

Albert Lindqvist 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).

  • Modularized pneumatic tractor with debris liquefier
    Patent number: 4407035
    Abstract: By providing a tractor with easily disassembled and assembled modular construction, with pneumatic drive and with high-pressure hydraulic means and vacuum means for, respectively, liquefying collected debris and exhausting it from the work area, an unique machine is provided which is particularly adapted for introduction into and use in cleaning areas, such as inside oil storage tanks, where flammable fumes exist and access openings into the work area are limited in size.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: October 4, 1983
    Inventor: Albert Lindqvist
  • Mobile machine for cleaning out the holds of oil tankers
    Patent number: D277897
    Type: Grant
    Filed: August 12, 1982
    Date of Patent: March 5, 1985
    Assignee: Joseph K. Dikoff
    Inventor: Albert Lindqvist