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You can extract the word from this scripts

awk '{for(i=1;i<=NF;i++) {if($i ~/[0-9]/) {print $i}}}' filename

[^ ]*[0-9][0-9][0-9][0-9][^ ]*
should be the proper regex.

$ cat sedinput
1) Adaptec SCSI RAID 5445
2) Adaptec SCSI 5445S RAID
3) ICP ICP5085BL SATA RAID
$ grep -o "[^...