The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 1997
Filed:
May. 12, 1995
Chiao-Yen Tai, Hsinchu, TW;
United Microelectronics Corp., Hsinchu, TW;
Abstract
An expandable controller for a video game machine. The expandable controller is connectable in series to a control deck of a video game machine. The expandable controller includes a keypad. A plurality of key-switches of the keypad generates key-pressed status signals corresponding to key-pressed status of the plurality of key-switches. An input port of a key-pressed status control circuit connected to the keypad receives the key-pressed status signals. The key-pressed status control circuit also receives a locking signal supplied by the control deck. A shift register is provided with a data input port, a clock input port, a reset input port and a data output port. The reset input port of the shift register is connected to the output port of the key-pressed status control circuit for receiving the key-pressed status signals from the keypad. A data read signal supplied by the control deck is inputted to the clock input port of the shift register to retrieve data from the shift register through the data output port.