Patents by Inventor Derrell Stevenson

Derrell Stevenson 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).

  • System for sorting and delivering mail
    Patent number: 6913151
    Abstract: A mail sorting and delivery system in which a portable mail tray is filled with sorted mail while positioned in a compartment having mail dividers. After the portable mail tray has received the sorted mail it is completely removed from the housing along with the mail in the portable mail tray and employed to deliver the mail.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: July 5, 2005
    Inventor: Derrell Stevenson
  • System for sorting and delivering mail
    Publication number: 20040080105
    Abstract: A mail sorting and delivery system in which a portable mail tray is filled with sorted mail while positioned in a compartment having mail dividers. After the portable mail tray has received the sorted mail it is completely removed from the housing along with the mail in the portable mail tray and employed to deliver the mail.
    Type: Application
    Filed: October 29, 2002
    Publication date: April 29, 2004
    Inventor: Derrell Stevenson