Patents by Inventor Ola Tellesbo

Ola Tellesbo 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).

  • Inorganic raw felt intended for the production of roof felt
    Patent number: 4097644
    Abstract: An improved raw felt material having a high degree of strength and flexibility and increased bulk. The raw felt is used in producing an asphalt roofing cover. The felt is formed from an adhesively bonded porous non-woven sheet of an inorganic fibrous material and has finally divided vulcanized rubber particles distributed within the fibrous material.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: June 27, 1978
    Assignee: Isola Fabrikker A/S
    Inventors: Harald Thiis Evensen, Ola Tellesbo