Patents by Inventor Hendrik Boxma

Hendrik Boxma 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).

  • Method and device for adjusting a hard-copy-unit
    Patent number: 5721623
    Abstract: A hard-copy-unit (HCU) or camera for recording medical images on film needs regular calibration to compensate for differences in film and film processing. This can be done by making a hard copy (HC) with a number of predetermined grey values and measuring the resulting optical densities on the hard copy. From the resulting optical density values new brightness (B) and contrast (C) parameters are determined that will result in the correct maximum and minimum optical densities of subsequently exposed and processed images on film.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: February 24, 1998
    Assignee: U.S. Philips Corporation
    Inventor: Hendrik Boxma