Patents by Inventor Lars Germundson

Lars Germundson 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).

  • Electric heating element
    Patent number: 4697063
    Abstract: An electric heating element includes a core of electrically conductive material connected to a source of alternating current and has a shell of impermeable concrete. The core is moulded from a mixture of graphite powder, silicate of potassium, cement and water.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: September 29, 1987
    Assignee: L G Innovations AB
    Inventor: Lars Germundson