Patents by Inventor Mary C. Au

Mary C. Au 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).

  • Custom rate pack for postage systems
    Patent number: 5255196
    Abstract: An improved postage scale (2). The scale contains a central processing unit (200) which calculates the amount of postage required for an article to be mailed. The central processing unit inputs rate information from battery augmented random access memory (208). A user programs the random access memory using the same keyboard (6) used for normal weighing operations. In preferred embodiments memory pack, including the battery augmented random access memory (208), is inserted in external slot (10) in the postage scale for added versatility.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: October 19, 1993
    Assignee: f.m.e. Corporation
    Inventors: Diem P. Tran, Mary C. Au