Subdivisions of the total amount in money cards

[danalex]

Here is a peculiar patent that you may want to have a look at:
http://www.ipo.gov.uk/p-find-publication-getPDF.pdf?PatentNo=GB2456000&DocType=A&JournalNumber=6267

Yes, I own a patent!

-Daniel Alexandre

[Atlas]

Let me guess, you would have cards with multiple private keys with set amounts? When you go to a merchant you just trade these private keys? The change gets sent back to a communicated public key?

I had the same idea awhile back. Way, way back. Remember the Woolong Device?

I snooze, I lose I guess. Enjoy your patent. You deserve it. You took the initiative.

[Atlas]

was it the wolong something device ?

Yep, anyways I don't want to rain on the OP's parade. It's his idea now.