| Number | Name | Date | Kind |
|---|---|---|---|
| 3508032 | MacDuffee et al. | Apr 1970 | |
| 3641931 | Hickox et al. | Feb 1972 | |
| 3735095 | Mutz et al. | May 1973 | |
| 3850299 | Kreitzer | Nov 1974 | |
| 3855457 | Amundson et al. | Dec 1974 | |
| 3978964 | Kwan | Sep 1976 | |
| 4040345 | Adams et al. | Aug 1977 | |
| 4064804 | Schweitzer | Dec 1977 | |
| 4073585 | Kobayashi et al. | Feb 1978 | |
| 4196665 | Rogers et al. | Apr 1980 | |
| 4277061 | Nagel et al. | Jul 1981 |
| Number | Date | Country |
|---|---|---|
| 2915720 | Oct 1980 | DEX |
| Entry |
|---|
| Hall et al, "Self-Contained . . . Reader/Encoder" IBM Technical Disclosure Bulletin, vol. 20, No. 5, pp. 1879-1880, 10/77. |