@James: Thanks very much for these insights - it sounds like you have perhaps the best grasp on the material at hand, some might say too good... ![Wink]()
To be certain, the patent was a starting point to begin unravelling the "Caramilk Secret" behind the barcodes - a foothold where there was none before. Others have tried to contribute towards it to expand out the "map".
Has it proven difficult? Yes. Fruitless? No - we've all learned more from the exercise and there's some joy derived out of deciphering it. So, to be clear, I am not fresh off the turnip truck, so to speak.![Wink]()
Now, you have posited some really interesting information about the expansion of the 6-digit code into a 48-bit bitfield - this sounds plausible, and warrants investigation, which may lead to understanding the internal checksums, which I and others have surmised exist.
Let's see where this takes us next!

To be certain, the patent was a starting point to begin unravelling the "Caramilk Secret" behind the barcodes - a foothold where there was none before. Others have tried to contribute towards it to expand out the "map".
Has it proven difficult? Yes. Fruitless? No - we've all learned more from the exercise and there's some joy derived out of deciphering it. So, to be clear, I am not fresh off the turnip truck, so to speak.

Now, you have posited some really interesting information about the expansion of the 6-digit code into a 48-bit bitfield - this sounds plausible, and warrants investigation, which may lead to understanding the internal checksums, which I and others have surmised exist.
Let's see where this takes us next!