Patents by Inventor Ah B. Tan

Ah B. Tan 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).

  • Variable-duration printer carriage motor acceleration method and apparatus
    Patent number: 5627947
    Abstract: Method and apparatus are described for accelerating a printer carriage motor for variable durations depending upon the available time between a lateral carriage stop and the first data to be printed in a given swath. The printer's controller is programmed to preview buffered print data, to determine for each print swath when the first printable matter will be printed and to cause the carriage motor to accelerate a variably greater length of time until such printable matter is to be printed. The controller causes the printhead to prim such printable matter in each swath at variably higher speeds representing the amount of time the motor was accelerated.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: May 6, 1997
    Assignee: Hewlett-Packard Company
    Inventors: James L. K. Chan, Ah B. Tan