Patents Assigned to Hair Free Centers
  • Impedance sensing epilator
    Patent number: 4372315
    Abstract: An epilator for treating a hair follicle of a subject utilizes a probe into which an RF pulse is applied. Shortly after the pulse is initiated, a measure of the impedance seen by the probe is determined and utilized for the purpose of adjusting the duration of the pulse such that the energy absorbed by the subject is independent of the impedance seen by the probe. As a consequence, the energy absorbed by the subject will have a predetermined maximum value substantially independent of the impedance seen by the probe.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: February 8, 1983
    Assignee: Hair Free Centers
    Inventors: Julius Shapiro, Andrew Eliason