Patents by Inventor Tonis Kao

Tonis Kao 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).

  • Vacuum cleaner
    Patent number: D260900
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: September 22, 1981
    Assignee: Bosch-Siemens Hausgerate GmbH
    Inventor: Tonis Kao
  • Telephone handset for mobile radio unit
    Patent number: D280895
    Type: Grant
    Filed: April 14, 1983
    Date of Patent: October 8, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventor: Tonis Kao
  • Telephone handset for mobile radio unit
    Patent number: D280986
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: October 15, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventor: Tonis Kao
  • Telephone handset or similar article
    Patent number: D284858
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: July 29, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventor: Tonis Kao