Patents by Inventor Lai K. Ma

Lai K. Ma 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).

  • Combined lantern and torch
    Patent number: D279821
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: July 23, 1985
    Assignee: Sonca Industries Limited
    Inventor: Lai K. Ma
  • Combined lantern, flashlight and warning lamp
    Patent number: D285975
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: September 30, 1986
    Assignee: Sonca Industries Limited
    Inventor: Lai K. Ma