Patents Assigned to Ilmasti Elektroniikka Oy
  • Procedure and means for measuring radon content in the air
    Patent number: 4977318
    Abstract: A procedure and a means for measuring radon content in the air, in which procedure the radon content in the air is measured by measuring the ion content of the air caused by the radon in the air and by its decay products.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: December 11, 1990
    Assignee: Ilmasti Elektroniikka Oy
    Inventors: Veikko Ilmasti, Thor G. Graeff
  • Method and apparatus for measuring radon content in the air
    Patent number: 4868386
    Abstract: A method and apparatus for measuring radon content in the air, in which procedure the radon content in the air is measured by measuring the ion content of the air caused by the radon in the air and by its decay products.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: September 19, 1989
    Assignee: Ilmasti Elektroniikka Oy
    Inventor: Veikko Ilmasti