Perry Li 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).
Abstract: The device includes radio frequency (RF) communication components installed within a case of the device and an antenna with an inverted E shape mounted within a header of the device. The antenna has three branches extending from a main horizontal arm: a capacitive branch connecting one end of the main arm to the case via a capacitive load; an RF signal feed branch connecting a middle portion of the main arm to the internal RF components of the device via a feedthrough; and an inductive branch connecting the opposing (far) end of the main arm to the case to provide a shunt to ground. The E-shaped configuration and the provision of capacitive loading allows for cancellation of inductance to bring the antenna into resonance and to provide optimal radiation efficiency as well as to provide for impedance with no reactive component.
June 29, 2012
January 2, 2014
Perry Li, Gabriel A. Mouchawar, Jorge Amely-Velez, Reza Imani
Abstract: An apparatus and method for controlling the torque of an exercise machine acting on a user is disclosed. The invention determines the torque which the user is able to exert at different positions and velocities, and develops a strength model of the user. Based on the strength model of the user, the invention determines a desired velocity profile for the user's exercise. The velocity profile may be chosen to maximize the amount of power output by the user or to provide whatever other type of exercise specified. The invention then controls the torque acting on the user so that the exercise is accomplished according to the desired velocity profile.
October 28, 1994
Date of Patent:
July 6, 1999
The Regents of theUniversity of California
Roberto Horowitz, Joel Shields, Perry Li, Steven L. Lehman