Patents by Inventor Theodor Schaffer

Theodor Schaffer 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).

  • Method, apparatus and network for renting textbooks
    Publication number: 20070088588
    Abstract: A method and apparatus for transacting a commercial rental of textbooks and other items between independent suppliers and independent users by a facilitator that does not generally maintain an inventory of the items for rent and without requiring a subscription with the users.
    Type: Application
    Filed: October 17, 2005
    Publication date: April 19, 2007
    Inventor: Theodore Schaffer
  • Device for filtering dust extracted from factory buildings
    Patent number: 4460389
    Abstract: A device for filtering dust from air drawn by apparatus from a factory shop or building, for example a steelmaking shop, including a plurality of dust extractors which have a total capacity at least equal to the air throughput of the drawn air. The extractors have regulators by which they can be regulated individually or in groups. Preferably each extractor is associated with an individual dust extractor and also each extractor preferably has its own individual cleaning system. The extractors are preferably of the dry filter bag type.
    Type: Grant
    Filed: February 21, 1980
    Date of Patent: July 17, 1984
    Assignee: Verfahrenstechnik Dr.Ing.Kurt Baum
    Inventors: Jorg P. Baum, Theodor Schaffer