Patents by Inventor Philip Y. W. Tsui

Philip Y. W. Tsui 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).

  • Wireless rolling code security system
    Patent number: 6243000
    Abstract: A processor-based transmitter-receiver system and method in which a receiver receives coded signals from at least two transmitters. A circuit for receiving a first coded signal from a first transmitter and a second coded signal from a second transmitter. Each of the coded signals includes a unique identification code and a variable security code. A memory stores at least two codes, each including a unique identification code and a variable security code. A processor coupled to the circuit and the memory, compares each of the received coded signals with each of the stored sets of codes. The processor generates a valid signal if one of the received coded signals matches one of the stored codes.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: June 5, 2001
    Inventor: Philip Y. W. Tsui
  • Remote transmitter-receiver controller system
    Patent number: 6005508
    Abstract: A transmitter-receiver controller system for remote actuation of devices or appliances such as security systems and garage door opener systems. The transmitter and receiver each utilize a programmable microcontroller for encoding and decoding signals. The device code, the data transmission format and the transmission frequency are selectable. The device code, data transmission format and the transmission frequency of the transmitter and/or the receiver can be selected to emulate other remote transmitter-receiver controller systems to enable operation of the present transmitter and receiver with those systems.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: December 21, 1999
    Inventor: Philip Y. W. Tsui
  • Remote transmitter-receiver controller for multiple systems
    Patent number: 5841390
    Abstract: The present invention provides a transmitter-receiver system which may selectively operate at one of a plurality of transmission frequencies and may selectively encode/decode the transmitted data in one of a plurality of data transmission formats. The present invention also provides a transmitter-receiver system in which a signal is transmitted using at least two different formats, so that manual selection of a specific transmission format is not required. Each transmitter and receiver includes a microcontroller which has been programmed to implement multiple encoding/decoding schemes and multiple data transmission formats in the unit. The microcontrollers may be programmed to implement any desired encoding/decoding scheme including the capability of emulating the encoding/decoding schemes and data transmission formats of transmitter-receiver systems currently in common use.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: November 24, 1998
    Inventor: Philip Y. W. Tsui
  • Remote transmitter-receiver controller system
    Patent number: 5680134
    Abstract: A transmitter-receiver controller system for remote actuation of devices or appliances such as security systems and garage door opener systems. The transmitter and receiver each utilize a programmable microcontroller for encoding and decoding signals. The device code, the data transmission format and the transmission frequency are selectable. The device code, data transmission format and the transmission frequency of the transmitter and/or the receiver can be selected to emulate other remote transmitter-receiver controller systems to enable operation of the present transmitter and receiver with those systems.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 21, 1997
    Inventor: Philip Y. W. Tsui
  • Transmitter case
    Patent number: D377458
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: January 21, 1997
    Inventor: Philip Y. W. Tsui
  • Keychain transmitter case
    Patent number: D380895
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: July 15, 1997
    Assignee: Capital Prospect Ltd.
    Inventor: Philip Y. W. Tsui
  • Receiver case
    Patent number: D382251
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 12, 1997
    Assignee: Capital Prospect Ltd.
    Inventor: Philip Y. W. Tsui
  • Remote control unit
    Patent number: D393629
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: April 21, 1998
    Assignee: Capital Prospect Ltd.
    Inventor: Philip Y. W. Tsui
  • Remote control unit
    Patent number: D410633
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: June 8, 1999
    Inventor: Philip Y. W. Tsui
  • Remote control unit bracket
    Patent number: D417436
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: December 7, 1999
    Inventor: Philip Y. W. Tsui
  • Remote control unit
    Patent number: D422268
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: April 4, 2000
    Inventor: Philip Y. W. Tsui