Number | Date | Country | Kind |
---|---|---|---|
83 17135 | Oct 1983 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3678250 | Dethloff | Jul 1972 | |
3818189 | Stone et al. | Jun 1974 | |
3849631 | Merlino | Nov 1974 | |
3906201 | Housman | Sep 1975 | |
4086442 | Rickard | Apr 1978 | |
4404464 | Moreno | Sep 1983 | |
4501960 | Jouvet | Feb 1985 | |
4523297 | Ugon | Jun 1985 |
Number | Date | Country |
---|---|---|
2477303 | Apr 1981 | FRX |
Entry |
---|
Credit Card Reader, G. W. Bowers, Jr. and E. G. Laenen, IBM Technical Disclosure Bulletin, vol. 9, No. 12, May 1967, pp. 1760-1761. |