This article is from the CD-Recordable FAQ, by Andy McFadden (email@example.com) with numerous contributions by others.
DisKovery 650 CD-R (2x2/1MB;SCSI, based on the Sony CDU920S)
DisKovery 1300 CD-R (6x2/512K;SCSI, based on the Sony CDU960S?)
Optima CDWriter (6x4x2/2MB;SCSI, based on ??)
As of the middle of 2003, Optima was busily suing CD-R software manufacturers
and resellers over (among other things) US patent #5,666,531. This patent,
filed in April of 1995, appears to cover packet writing.