Kevin SevignyCambridge, MA

6729543, May 4, 2004

Mar 5, 1999

09/263978

Barry M. Arons - Waltham MA
Lisa J. Stifelman - Waltham MA
Stephen D. Fantone - Lynnfield MA
Kevin Sevigny - Newburyport MA

AudioVelocity, Inc. - Mountain View CA

G06K 710

23546213, 23546201, 23546225

An information processing system automatically identifies the page of a book, notebook, flip chart, writing pad, or the like. The system uses an optical sensor to read an identification code printed on each page (and the cover) of the book and processes the code to determine identifying information (e. g. , page number) for the page. The optical sensor and related components are adjacent to the book and operate unobtrusively, yet reliability, at a distance therefrom. The system, which uses ambient light and selectively activates its own light source, is capable of operating under variable lighting conditions and requires no manual intervention by the user. In addition, the system is reliable and robust in that it allows standard printing techniques to be used to print the identification code on each page of the book.

6226081, May 1, 2001

Mar 16, 1998

9/039632

Stephen D. Fantone - Lynnfield MA
Brian W. Anthony - Somerville MA
Kevin M. Sevigny - Newburyport MA
Stephen R. Wilk - Saugus MA

Optikos Corporation - Cambridge MA

G01N 2100
G01N 2190

3562396

The height-of-fill of a container comprising a body having an optically detectable feature, and contents filling the body up to a fill level, at least a measuring portion of the container extending from the optically detectable feature to the fill level being capable of transmitting electromagnetic radiation, is determined by illuminating at least the measuring portion of the container with electromagnetic radiation; forming an image of part of this measuring portion of the container; and analyzing the image by data processing means to identify: (a) a first region having a first intensity that varies in accordance with the properties of the optically detectable feature; and (b) a second region having a second intensity that varies in accordance with the optical properties of the contents below the fill level, and determining the distance between a point within the first region and the upper edge of the second region, thereby determining the height-of-fill.