Patents by Inventor Wouter Gerrit HIETKAMP

Wouter Gerrit HIETKAMP 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).

  • Percussion instrument
    Patent number: 11380293
    Abstract: A percussion instrument includes a drum head arranged on a support with a flange of the drum head extending from the support, wherein the support is an inner ring, and an outer ring comprising an abutment that is configured to engage the flange of the drum head. The inner ring and the outer ring are concentrically arranged and moveable relative to each other in a longitudinal direction. The percussion instrument also includes a tensioning mechanism having an external screw thread going around on an outer circumference of the inner ring, and an internal screw thread going around on an inner circumference of the outer ring.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: July 5, 2022
    Inventors: Wouter Gerrit Hietkamp, Gerrit Willem Hietkamp
  • PERCUSSION INSTRUMENT
    Publication number: 20210142769
    Abstract: A percussion instrument includes a drum head arranged on a support with a flange of the drum head extending from the support, wherein the support is an inner ring, and an outer ring comprising an abutment that is configured to engage the flange of the drum head. The inner ring and the outer ring are concentrically arranged and moveable relative to each other in a longitudinal direction. The percussion instrument also includes a tensioning mechanism having an external screw thread going around on an outer circumference of the inner ring, and an internal screw thread going around on an inner circumference of the outer ring.
    Type: Application
    Filed: July 3, 2018
    Publication date: May 13, 2021
    Inventors: Wouter Gerrit HIETKAMP, Gerrit Willem HIETKAMP