Daniel W Marcus

US Patent:

47831677, Nov 8, 1988

Filed:

May 5, 1987

Appl. No.:

7/046906

Inventors:

Michael Schiller - Riverdale NY
Daniel H. Marcus - New City NY

Assignee:

Fingermatrix, Inc. - North White Plains NY

International Classification:

G06K 920

US Classification:

356 71

Abstract:

A curved cylindrical segment platen has a concave touching surface. An interrogating slit light beam is scanned around the platen to scan a finger held against the touching surface. An optical imaging system images the zone illuminated onto an array of photo-transducers to provide a signal representing the fingerprint. The optical system is rotated around the platen. The axis of the interrogating light beam is substantially normal to the touching surface. The axis of the imaging system is off normal by about 56 degrees, an amount which is greater than a critical angle equal to the maximum angle of refraction in the platen. This critical angle is approximately 41 degrees. The axis of the imaging system is also off normal to the non-touching surface by an angle that is less than this critical angle of 41 degrees and thus less than the angle of total internal reflection. As a consequence, the image at the photo-transducers provides a completely dark valley zone and a sharply contrasting light image ridge zone. In a second embodiment, a thick flat platen has a flat touching surface and an opposed parallel flat surface through which an illuminating light beam is applied to scan across a finger applied to the touching surface.

US Patent:

47877421, Nov 29, 1988

Filed:

Jan 29, 1987

Appl. No.:

7/008590

Inventors:

Michael Schiller - Riverdale NY
Daniel H. Marcus - New City NY

Assignee:

Fingermatrix, Inc. - North White Plains NY

International Classification:

G06K 920

US Classification:

356 71

Abstract:

The technique for optically scanning a finger to produce a fingerprint image involves positioning the finger surface to be optically scanned so that it is exposed and, in particular, is not pressed against a platen. A slit light beam along the length of the forward part of the finger is circumferentially rotated about an axis about the nominal center of the finger. A reflected slit light beam carries modulation information which is focused on a linear array of photo-electric transducers to provide the fingerprint image. The interrogating light is coherent, substantially collimated, light. The plane of the interrogating slit light beam and the plane of the reflected modulated slit light beam are coplanar thereby establishing an illumination plane. The illumination plane is parallel to the axis of the finger and is rotated about that axis during the interrogating scan. The illumination plane is slightly offset from that rotational axis and the incident light in the illumination plane impinges on the finger surface at a slight off-normal axis.

US Patent:

20210272026, Sep 2, 2021

Filed:

Feb 28, 2020

Appl. No.:

16/804501

Inventors:

Daniel Marcus - New York NY, US

International Classification:

G06Q 10/02
G06Q 20/32

Abstract:

A method, computer program product and a system for receiving information corresponding to an event ticket, determining a value of the event ticket, publishing at least a portion of the information corresponding to the event ticket and the value of the event ticket, receiving an offer for the event ticket and providing the offer to a current owner of the event ticket.