Patents by Inventor Muneyuki Date

Muneyuki Date 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).

  • Magnetic characteristics measuring apparatus with a balancing mechanism
    Patent number: 5252920
    Abstract: A magnetic characteristics measuring apparatus attains high sensitivity measurement of magnetic characteristics of a specimen. A magnetic field is applied for a predetermined time to the specimen, which is suspended from a beam at one side of a balance, by a solenoid electromagnet, thereby imparting a magnetic force on the specimen. The free oscillating amplitude of the balance following removal of the magnetic force is detected by a laser micro-range finder. Magnetic characteristics of the specimen are measured based on a relationship between the oscillating amplitude and the intensity of the applied magnetic field. The influence of magnetic noise or of magnetic characteristics of the measuring apparatus itself is eliminated, and a very high sensitivity on the order of less than 10.sup.-12 emu is realized in finding magnetic susceptibility with a simple structure.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: October 12, 1993
    Inventors: Muneyuki Date, Akio Yamagishi