KEVIN JAMES MCDONNELL
Pilots at Johnson Dr, Pleasanton, CA

2005017, Aug 4, 2005

Feb 3, 2004

10/771984

Robert Edmonds - Saratoga CA, US
Kevin McDonnell - Pleasanton CA, US
Johan Meulder - Kessel, BE

G06F012/00

711112000, 711170000

A method and apparatus for uniquely identifying a digital storage medium is described. In one example, at least one physical attribute of a recording surface is determined. For example, at least one position of the recording surface may be associated with at least one data unit stored on the digital storage medium. Identification indicia is formed from the at least one physical attribute. In another example, a digital recording source is associated with a digital storage medium that was replicated from the source. Identification indicia associated with the digital recording source is obtained by analyzing at least one physical attribute of a recording surface on the digital storage medium. The identification indicia is then compared with the at least one physical attribute to determine if the digital recording source was in fact used to replicate the digital storage medium.

5402270, Mar 28, 1995

Aug 26, 1994

8/296451

Kevin McDonnell - Pleasanton CA
George Barker - late of San Jose CA

Trace Mountain Products, Inc. - San Jose CA

G11B 586

360 15

A method for duplicating data on a rotating magnetic disk in sectors on concentric tracks so that the sectors are aligned with each other from track to track and referenced to an index mark. The index mark is sensed as the disk rotates. The time elapsed between sensed index marks is counted to define the angular displacement of the disk. A magnetic head is moved successively to the tracks on the disk. Data to be duplicated is recorded in sequence, sector by sector, on the respective tracks beginning at different offsets from the index mark such that recording begins with the next sector encountered after the head arrives at the respective tracks.