Patents by Inventor Melvyn Ettinger

Melvyn Ettinger 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).

  • Transparency storage and display apparatus
    Patent number: 4203659
    Abstract: An apparatus designed for the purpose of viewing transparencies on an overhead projector is disclosed. The apparatus incorporates a frame and the transparencies are retained by a portion of the frame defining a mounting member. Substantially all of the weight of the frame is concentrated in the mounting member and a member in opposed, spaced relationship to the mounting member. Tabs extending from the mounting member into the area circumscribed by the frame, in which area the transparencies are positioned for storage and display, serve to retain the transparencies in relative alignment.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: May 20, 1980
    Assignee: Instructo/McGraw-Hill, Inc.
    Inventors: Paul Constantine, Melvyn Ettinger, Harry S. Rubin
  • Stage for transparency projection
    Patent number: D256023
    Type: Grant
    Filed: December 1, 1977
    Date of Patent: July 22, 1980
    Assignee: Instructo/McGraw-Hill, Inc.
    Inventors: Paul Constantine, Melvyn Ettinger, Harry S. Rubin