There should be Swiss army knife canes. A cane should have a picker-upper, and a place to put a flask, a knife, pepper spray, a derringer, or a flashlight. The tip needs to be rubber.
- Multi-Functional Foldable LED Walking Cane, which is just an adjustable height folding cane with an LED.
- Grabber Cane, which is just what I was thinking of.
- Helping Hand Crane, another pickerupper one.
- The MTP-6 tactical pen, with flashlight, pen, bottle opener, sort of wrench and screwdriver. COuld add a scissors.
Improve on them for business cards. Maybe just a frame. Maybe spirals. Patent the software. THere is opensource Python QR code code available in the Pyzbar library. Talk with cellphone companies.