Patents by Inventor Donald J. Valsvik

Donald J. Valsvik 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).

  • Patent number: 4219101
    Abstract: A floor-standing acoustic space divider has an upward and outward protuberance along the top edge of at least one of its sides. The protuberance increases the acoustic shadow of the space divider, reflects direct sound back into the area from which it originates, improves speech privacy in open plan architectural space and improves noise reduction in its immediate locale.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: August 26, 1980
    Assignee: Conwed Corporation
    Inventor: Donald J. Valsvik