IPC G06Q20/00

# Status Description
1980064100 Ceased PLURAL ENCRYPTION
1983017032 Expired Subscription television remote billing system
1984031803 Ceased IMPROVEMENTS IN POINT OF SALE AND ELECTRONIC FUNDS TRANSFER SYSTEMS
1985048100 Ceased Card verification and validation
1986055228 Lapsed DATA ENTRY SYSTEM
1986056132 Ceased Card issuance apparatus
1986058665 Ceased Record playback counter
1987070618 Ceased Automatic transaction machine
1987073539 Ceased Method and apparatus for verifying identity
1987076072 Ceased A pay phone system
1987079214 Expired Cellular mobile radio credit card system
1987079612 Expired Automated transaction system
1988014495 Expired Method and system for remote reporting, particularly for pay television billing
1988021971 Ceased A method and system for authentication of accreditations and of messages with zero-knowledge proof and for the signing of messages, and a station for use in such system, in particular executed as a smart card station
1988025124 Expired Public key/signature cryptosystem with enhanced digital signature certification
1988027159 Ceased Video cassette rental system and method and record playback counter therefor
1989036890 Ceased Computer and telephone apparatus with user friendly computer interface and enhanced integrity features
1989038326 Lapsed Bi-modular integrated circuit card payment system
1989042014 Lapsed Credit card storage system
1989042425 Expired Public key/signature cryptosystem with enhanced digital signature certification