This invention is a family of simple, inexpensive, and portable electronic devices for business support built around a simple 2-dimensional digitizing device. It includes a transmit-only facsimile transmission device/system, a simple computer-based facsimile system, and a dual-mode (digital or OCR) page...http://www.google.se/patents/US4849815?utm_source=gb-gplus-sharePatent US4849815 - Portable electronic office and components suitable therefor
