Patents by Inventor Max H. Dufford, Jr.

Max H. Dufford, Jr. 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).

  • Counting system for articles conveyed in a stream
    Patent number: 4217491
    Abstract: An electro-optical device mounted over a conveyed stream of articles for sensing the passage of each article by projecting a single spot of light onto the articles and measuring the reflectance of that spot from two different angles. The measured reflectance values are fed to an electronic comparator which produces an output signal when one reflectance value exceeds the other by a predetermined amount.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: August 12, 1980
    Assignee: Nolan Systems Inc.
    Inventors: Max H. Dufford, Jr., Earl T. Price