Eastman Chemical Company

Isotag Technology, Inc.

Randy Barnett Meade

Michael John Cyr

James John Krutak, Sr

Horst Clauberg

James Edward Moore

Gabor Patonay

Tony Wayne Helton

Gregory Wayne Nelson

Barbara Crawford Jackson

G Russell Owens

Methods for marking digital compact discs as a means to determine its

An apparatus for detecting an invisible, near infrared fluorescing mark disposed on a background comprises: includes an excitation source for exciting the mark, having sufficient power to excite the mark and provide a fluorescent signal the mark from a; a signal detector for detecting the fluorescent signal from the mark; a and power modulator means for varying the power if the excitation source between zero and the maximum power level to produce a decodable fluorescent signal from the mark disposed on the background. A process for decoding an invisible mark having a near infrared fluorescing material includes the steps of: providing at least one invisible, near infrared fluorescing mark disposed on at least one portion of a background; exciting the mark with a laser having a maximum power level sufficient to provide a fluorescent signal from the mark; detecting the fluorescent signal and concurrently varying the power of the laser between zero and its maximum power, to obtain a decodable fluorescent signal.

Scanners for reading near infrared fluorescent marks

Growing community of inventors

Kingsport, TN, United States of America

Randy Barnett Meade