06201662 is referenced by 5 patents and cites 89 patents.

A data storage cartridge for a data storage disk drive has a latent illuminance marker. A reflective surface on the cartridge increases the intensity of the irradiance on the marker and illuminance from the marker. A light source illuminates the marker and the marker emits phosphorescence. A photosensor detects the emitted illuminance, and the decay time is determined. The decay time is checked to provide identification of different types or generations of data storage cartridges or provides a secure keying mechanism for authorized access to proprietary software.

Title
Latent illuminance discrimination marker with reflective layer for data storage cartridges
Application Number
9/337059
Publication Number
6201662 (B1)
Application Date
June 21, 1999
Publication Date
March 13, 2001
Inventor
Klinton D Washburn
Roy
UT, US
Todd L Graves
Garland
UT, US
Agent
Woodcock Washburn Kurtz Mackiewicz & Norris
US
Assignee
Iomega Corporation
UT, US
IPC
G11B 23/03
View Original Source