Patents by Inventor Antal Lisziewicz

Antal Lisziewicz 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).

  • Anamorphic attachment for purpose of filming and reproduction to be used together with a basic lens
    Patent number: 5184880
    Abstract: An anamorphic attachment (3) for purposes of filming and reproduction to be used in conjunction with a basic lens (2). At the attachment (3) there is a first subsystem (8) serving the main purpose of enlargement in a first direction and a second subsystem (7) serving the main purpose of enlargement in a direction vertical to the first direction. The first subsystem (8) contains a positive front lens group (12) and a negative rear lens group (13). The second subsystem (7) a negative front lens group (9) and a positive rear lens group (10). The second subsystem (7) is located between the first subsystem (8) and the basic lens (2), providing that the adjacent negative lens groups (13, 9) of the two subsystems (8, 7) may also be exchanged. If the basic lens (2) is set to a focal length Fg and the attachment to the object distance "infinity" and the total focal length is V1.multidot.Fg in the first direction and the total focal length V2.multidot.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: February 9, 1993
    Assignee: Isco Optic GmbH
    Inventor: Antal Lisziewicz