Patents by Inventor Hartmut Pfeiffer

Hartmut Pfeiffer 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).

  • Housing for accomodating at least one disc-shaped information carrier
    Patent number: 5850912
    Abstract: A housing for accommodating at least one disc-shaped information carrier, for example a CD, includes a bottom part, a lid part, and a support part held by the housing for retaining the information carrier. The support part includes a raised side grip which enters a recess of the lid part when the housing is closed. To increase the stability of the housing and to provide better identification for different housings, a closed reservoir is arranged in at least one hollow space formed in the housing and filled with a substance.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: December 22, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Christa Ganser, Karen Schrader, Hartmut Van Eupen, Hartmut Pfeiffer
  • Sample taking apparatus
    Patent number: 4026154
    Abstract: Apparatus for taking samples from a stream of material discharged along a path from a conveyor comprises a gate movable between either one of two different positions in one of which the gate lies in the path of the stream of material and in the other of which the gate is clear of the path. Depending upon the position of the gate, the material is discharged to one of two different receivers.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: May 31, 1977
    Assignee: Polysius AG
    Inventors: Hartmut Pfeiffer, Manfred Hilbig, Wolfgang Krella