Patents Assigned to Lindsay Mfg, Inc.
  • Method for controlling a vacuum cleaner or a central vacuum cleaner
    Patent number: RE36584
    Abstract: The invention relates to a method of control for a device such as a vacuum cleaner or a central vacuum cleaner comprising a central machinery and a pipe or a pipe system connecting the central machinery with a working point.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: February 29, 2000
    Assignee: Lindsay Mfg, Inc.
    Inventors: Jouko Harkonen, Reino Mustalampi