Patents by Inventor Louis Richer

Louis Richer 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 the payment of telephone calls in a private self-switching unit
    Patent number: 5003585
    Abstract: A telephone system uses a badge which contains electronically stored data including information about pre-paid credits. When a call is made, data is read from and into the badge to leave a credit balance standing in the badge after the charges for a call have been deducted.
    Type: Grant
    Filed: April 11, 1989
    Date of Patent: March 26, 1991
    Inventor: Louis Richer