Patents Assigned to Chien-Hua Chang
  • Automatic mailing apparatus
    Patent number: 4923022
    Abstract: An automatic mailing apparatus comprises a transfer device, a weighing device, a stamping device, a detecting device and a collecting device. The automatic mailing apparatus is an automatic machine in the shape of a case. The case has a front panel for mailing operations and a letter insertion and retrieval slot formed in the front panel. A letter to be mailed may be inserted into the case through the letter insertion and retrieval slot and automatically transferred for weighing, stamping and sorting.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: May 8, 1990
    Assignee: Chien-Hua Chang
    Inventor: Tzu-Yen Hsieh