Patents by Inventor Sven C. Frederiksen

Sven C. Frederiksen 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).

  • Biological surgical dressing
    Patent number: 4215693
    Abstract: A biological surgical dressing, especially a surgical dressing for wounds composed of a combination of collagen fibers and carbamide, primarily in a ratio of 65 to 99 percent by weight collagen fibers and 1 to 35 percent by weight carbamide.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: August 5, 1980
    Inventors: Ulf S. E. Rothman, Sven C. Frederiksen, Bernt O. Leube