Number | Date | Country | Kind |
---|---|---|---|
3442755 | Nov 1984 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3617127 | McDuff | Nov 1971 | |
4006984 | Friese | Feb 1977 | |
4226526 | Spence-Bate et al. | Oct 1980 | |
4334472 | Back et al. | Jun 1982 | |
4371309 | Principe et al. | Feb 1983 | |
4402592 | Schoen et al. | Sep 1983 | |
4462678 | Back | Jul 1984 |
Entry |
---|
IBM Technical Disclosure Bulletin, vol. 21, No. 1, Jun. 1978, Gagne et al., "Device Air Transport System", pp. 84-85. |