Patents by Inventor Michael Peter Greenwood

Michael Peter Greenwood 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).

  • Angle measuring device
    Patent number: 4060900
    Abstract: An angle measuring device including two discs pivoted together at their common center for relative rotation, each disc having a slit extending from its center to its periphery and arranged so that, on relative rotation of the discs, a scale provided on the device indicates the amount of relative rotation.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: December 6, 1977
    Inventor: Michael Peter Greenwood