Patents by Inventor Hendricus W. A. Dukkers

Hendricus W. A. Dukkers 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).

  • Resting device with rotatable covering envelope
    Patent number: 4550457
    Abstract: The invention relates to a resting device.According to the invention this resting device comprises an at least partly horizontal lying means extending at a distance above the ground and connected at its ends with uprights, which lying means is provided with an adjustably supported tube-shaped envelope, in which an opening is formed for getting in and out of the device, said envelope comprising on either side an end ring, which end rings are supported within the uprights by support rollers.
    Type: Grant
    Filed: May 22, 1984
    Date of Patent: November 5, 1985
    Inventor: Hendricus W. A. Dukkers