Patents Assigned to Incentive AB
  • Microwave oscillator having negative resistance diode inductively and capacitively mounted in waveguide cavity
    Patent number: 4021755
    Abstract: A microwave oscillator comprises a wave-guide having a closed end with a semiconductor diode having a negative differential resistance for the frequency used placed in the wave-guide spaced from the closed end and electrically connected to two elements protruding inwardly from opposite walls of the wave-guide, with one of the elements being electrically isolated from the wall and having an unsymmetrical, rotatable body. The wave-guide may be conical if desired.
    Type: Grant
    Filed: September 5, 1975
    Date of Patent: May 3, 1977
    Assignee: Incentive AB
    Inventor: Stig Lennart Svensson
  • Hammer for pianos and similar instruments
    Patent number: 3967521
    Abstract: A system for adjusting the tonal quality of piano hammers or similar objects consists of incorporating a tensioning device into the device for attaching the string-engaging cover to the hammer so that the stiffness of the cover may be varied. The cover itself may consist of an elastic rubber-like material.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: July 6, 1976
    Assignee: Incentive AB
    Inventor: Gunnar Sjostrand