a distinct, recognizable pattern of numbers a combination of numbers, letters, and/or symbols a barcode or QR code a specific font or typeface a watermark or logo associated with the d, number a particular color scheme or design associated with the d, number
d, number which is a distinct, recognizable pattern of numbers d, number which is a combination of numbers, letters, and/or symbols d, number which is a barcode or QR code d, number which is a specific font or typeface d, number which is a watermark or logo associated with the d, number d, number which is a particular color scheme or design associated with the d, number