Patents by Inventor Ervin Leitman

Ervin Leitman 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).

  • Patent number: 4516871
    Abstract: A sheet protector formed of upper and lower layers of substantially transparent plastic material. A pair of complementary tabs each laterally extending from the edges of the respective layers are integrally formed therewith. Heat sealing is utilized for securing together at least some of the peripheries of the layers as well as the matching tabs. An opening is provided to define in combination with the layers a receiving pocket whereby a sheet may be inserted in the pocket. A looseleaf type binder is provided for holding a plurality of the sheet protectors. The tab positions of the respective sheet protectors in the binder are sequentially indexed with respect to each other to provide a set of position selectable sheet protectors.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: May 14, 1985
    Inventor: Ervin Leitman