Patents by Inventor Arnulf Hager

Arnulf Hager 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).

  • Process for recording and reproduction of information in electromagnetic form
    Patent number: 4031525
    Abstract: A process for the storage and retrieval of information in electromagnetic form from an information carrier, made of ferromagnetic, ferrimagnetic, antiferrimagnetic, metamagnetic ferroelectric or antiferroelectric material. An information carrier builds up a stationary image of the information signal in one dimension along the propagation path of the signal obtained by a short-term high frequency pre-polarization of information carrier by means of an alternating electric or magnetic field. Reproduction of the information can be obtained by analogous means either non-destructively or destructively.
    Type: Grant
    Filed: April 8, 1974
    Date of Patent: June 21, 1977
    Assignee: VEB Kabelwerk Oberspree (KWO)
    Inventors: Horst Volz, Reinhard Straubel, Arnulf Hager