Patents by Inventor Marshall Li

Marshall 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).

  • Remote control apparatus
    Patent number: 4912463
    Abstract: A remote control apparatus has a transmitter which is capable of being switched between a normal position and a changing position, and a receiver which is capable of being switched between a normal mode and a changing mode. The remote control apparatus utilizes a first memory device in the transmitter to store an address code; an address code generator in the transmitter to generate a new address code and to store it in the first memory device when the transmitter is switched to the changing position; and a transmitting device in the transmitter to transmit the address code stored in the first memory device.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: March 27, 1990
    Assignee: Princeton Technology Corporation
    Inventor: Marshall Li